PayPal Checkout and Pre-order "Upon release" compatibility

[dphyled]

(Initially opened in Pre-order repo, but advised to move here -- looks like compat for Stripe payment request buttons are handled in Stripe plugin)

Describe the bug

When a pre-order product is set to charge "Upon release", and PayPal Checkout buttons are set to display on the single product page and Cart page, the customer can click them and go through payment flow with PayPal. But after returning to site, on the "Confirm your PayPal order" page they get an error message that there are no payment methods allowed.

To reproduce

1. Create product with Pre-order set to charge "Upon release"
2. Enable a PayPal Checkout buttons to show on single Product page
3. Visit single product page and click on PayPal button, then go through payment steps in PP modal
4. Return to site, and see error that no payment methods are available

Screenshot direct link: https://d.pr/i/bqWNP7

Expected behavior

I guess, don't display PayPal buttons for Pre-order products where payment is not being taken up front.

Environment (please complete the following information):

• WordPress Version: 5.6.1
• WooCommerce Version: 5.0.0
• PayPal (Express) Checkout Plugin Version: 2.1.1
• Browser [e.g. chrome, safari] and Version: Chrome Version 88.0.4324.150 (Official Build) (x86_64)

Additional details

System status

``` ### WordPress Environment ###

WordPress address (URL): https://kelwoo.test
Site address (URL): https://kelwoo.test
WC Version: 5.0.0
REST API Version: ✔ 5.0.0
WC Blocks Version: ✔ 4.0.0
Action Scheduler Version: ✔ 3.1.6
WC Admin Version: ✔ 1.9.0
Log Directory Writable: ✔
WP Version: 5.6.1
WP Multisite: –
WP Memory Limit: 2 GB
WP Debug Mode: ✔
WP Cron: ✔
Language: en_US
External object cache: –
Server Environment

Server Info: nginx/1.19.4
PHP Version: 7.4.13
PHP Post Max Size: 128 MB
PHP Time Limit: 300
PHP Max Input Vars: 1000
cURL Version: 7.74.0
(SecureTransport) OpenSSL/1.1.1i

SUHOSIN Installed: –
MySQL Version: 5.7.32
Max Upload Size: 128 MB
Default Timezone is UTC: ✔
fsockopen/cURL: ✔
SoapClient: ✔
DOMDocument: ✔
GZip: ✔
Multibyte String: ✔
Remote Post: ✔
Remote Get: ✔
Database

WC Database Version: 5.0.0
WC Database Prefix: wp_
Total Database Size: 37.51MB
Database Data Size: 24.51MB
Database Index Size: 13.00MB
wp_woocommerce_sessions: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
wp_woocommerce_api_keys: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_woocommerce_attribute_taxonomies: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
wp_woocommerce_downloadable_product_permissions: Data: 0.02MB + Index: 0.06MB + Engine InnoDB
wp_woocommerce_order_items: Data: 0.13MB + Index: 0.08MB + Engine InnoDB
wp_woocommerce_order_itemmeta: Data: 1.23MB + Index: 1.80MB + Engine InnoDB
wp_woocommerce_tax_rates: Data: 0.02MB + Index: 0.06MB + Engine InnoDB
wp_woocommerce_tax_rate_locations: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_woocommerce_shipping_zones: Data: 0.02MB + Index: 0.00MB + Engine InnoDB
wp_woocommerce_shipping_zone_locations: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_woocommerce_shipping_zone_methods: Data: 0.02MB + Index: 0.00MB + Engine InnoDB
wp_woocommerce_payment_tokens: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
wp_woocommerce_payment_tokenmeta: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_woocommerce_log: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
wp_actionscheduler_actions: Data: 1.16MB + Index: 0.70MB + Engine InnoDB
wp_actionscheduler_claims: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
wp_actionscheduler_groups: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
wp_actionscheduler_logs: Data: 1.38MB + Index: 0.45MB + Engine InnoDB
wp_advanced_notifications: Data: 0.02MB + Index: 0.00MB + Engine InnoDB
wp_advanced_notification_triggers: Data: 0.02MB + Index: 0.00MB + Engine InnoDB
wp_ariadminer_connections: Data: 0.02MB + Index: 0.00MB + Engine InnoDB
wp_auctions_for_woocommerce_log: Data: 0.02MB + Index: 0.00MB + Engine InnoDB
wp_automatewoo_abandoned_carts: Data: 0.02MB + Index: 0.08MB + Engine InnoDB
wp_automatewoo_customers: Data: 0.02MB + Index: 0.09MB + Engine InnoDB
wp_automatewoo_customer_meta: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_automatewoo_events: Data: 0.02MB + Index: 0.05MB + Engine InnoDB
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wp_automatewoo_referrals: Data: 0.02MB + Index: 0.08MB + Engine InnoDB
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wp_followup_coupons: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_followup_coupon_logs: Data: 0.02MB + Index: 0.05MB + Engine InnoDB
wp_followup_customers: Data: 0.02MB + Index: 0.06MB + Engine InnoDB
wp_followup_customer_carts: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_followup_customer_notes: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_followup_customer_orders: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
wp_followup_email_excludes: Data: 0.02MB + Index: 0.05MB + Engine InnoDB
wp_followup_email_logs: Data: 0.02MB + Index: 0.05MB + Engine InnoDB
wp_followup_email_orders: Data: 0.02MB + Index: 0.09MB + Engine InnoDB
wp_followup_email_tracking: Data: 0.02MB + Index: 0.08MB + Engine InnoDB
wp_followup_followup_history: Data: 0.05MB + Index: 0.05MB + Engine InnoDB
wp_followup_order_categories: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_followup_order_items: Data: 0.02MB + Index: 0.05MB + Engine InnoDB
wp_followup_subscribers: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_followup_subscribers_to_lists: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
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wp_i13_woo_slider: Data: 0.02MB + Index: 0.00MB + Engine InnoDB
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wp_options: Data: 3.03MB + Index: 0.16MB + Engine InnoDB
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wp_terms: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_term_relationships: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
wp_term_taxonomy: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_usermeta: Data: 0.08MB + Index: 0.06MB + Engine InnoDB
wp_users: Data: 0.02MB + Index: 0.05MB + Engine InnoDB
wp_wcpv_commissions: Data: 0.02MB + Index: 0.00MB + Engine InnoDB
wp_wcpv_per_product_shipping_rules: Data: 0.02MB + Index: 0.00MB + Engine InnoDB
wp_wcrp_rental_products_rentals: Data: 0.02MB + Index: 0.00MB + Engine InnoDB
wp_wcs_payment_retries: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
wp_wc_admin_notes: Data: 0.02MB + Index: 0.00MB + Engine InnoDB
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wp_wc_bookings_availability: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
wp_wc_bookings_availabilitymeta: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_wc_booking_relationships: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_wc_category_lookup: Data: 0.02MB + Index: 0.00MB + Engine InnoDB
wp_wc_customer_lookup: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_wc_deposits_payment_plans: Data: 0.02MB + Index: 0.00MB + Engine InnoDB
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wp_wc_order_tax_lookup: Data: 0.05MB + Index: 0.03MB + Engine InnoDB
wp_wc_points_rewards_user_points: Data: 0.02MB + Index: 0.03MB + Engine InnoDB
wp_wc_points_rewards_user_points_log: Data: 0.02MB + Index: 0.05MB + Engine InnoDB
wp_wc_product_meta_lookup: Data: 0.05MB + Index: 0.09MB + Engine InnoDB
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wp_wc_warranty_products: Data: 0.02MB + Index: 0.05MB + Engine InnoDB
wp_wc_webhooks: Data: 0.02MB + Index: 0.02MB + Engine InnoDB
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wp_woocommerce_shipping_table_rates: Data: 0.02MB + Index: 0.00MB + Engine InnoDB
wp_woocommerce_square_customers: Data: 0.02MB + Index: 0.00MB + Engine InnoDB
wp_wpml_mails: Data: 9.52MB + Index: 0.00MB + Engine InnoDB
Post Type Counts

afadv_qty: 2
attachment: 32
aw_workflow: 9
bookable_person: 4
bookable_resource: 2
custom_css: 1
customize_changeset: 9
event_ticket: 4
follow_up_email: 2
lty_lottery_ticket: 2
nav_menu_item: 10
order_shipment: 4
page: 27
post: 2
product: 87
product_variation: 107
revision: 72
shipping_package: 1
shop_coupon: 13
shop_order: 255
shop_order_refund: 7
shop_subscription: 27
tribe_events: 1
tribe_rsvp_tickets: 1
warranty_request: 2
wc_booking: 29
wc_membership_plan: 2
wc_memberships_team: 1
wc_team_invitation: 1
wc_user_membership: 2
wcpf_item: 7
wcpf_project: 2
Security

Secure connection (HTTPS): ✔
Hide errors from visitors: ✔
Active Plugins (16)

ARI Adminer: by ARI Soft – 1.2.3
WooCommerce PayPal Checkout Gateway: by WooCommerce – 2.1.1
WooCommerce Stripe Gateway: by WooCommerce – 4.8.0
WooCommerce Pre-Orders: by WooCommerce – 1.5.29
WooCommerce: by Automattic – 5.0.0
Inactive Plugins (718)

[redacted since I use the all-plugins repo]
Settings

API Enabled: –
Force SSL: –
Currency: USD ($)
Currency Position: left
Thousand Separator: ,
Decimal Separator: .
Number of Decimals: 2
Taxonomies: Product Types: accommodation-booking (accommodation-booking)
auction (auction)
booking (booking)
bundle (bundle)
external (external)
grouped (grouped)
lottery (lottery)
mix and match (mix-and-match)
simple (simple)
subscription (subscription)
variable (variable)
variable subscription (variable-subscription)

Taxonomies: Product Visibility: exclude_from_catalog (exclude_from_catalog)
exclude_from_search (exclude_from_search)
exclude-from-catalog (exclude-from-catalog)
exclude-from-search (exclude-from-search)
featured (featured)
outofstock (outofstock)
rated-1 (rated-1)
rated-2 (rated-2)
rated-3 (rated-3)
rated-4 (rated-4)
rated-5 (rated-5)

Connected to WooCommerce.com: ✔
WC Pages

Shop base: #6 - /shop/
Cart: #7 - /cart/
Checkout: #8 - /checkout/
My account: #9 - /my-account/
Terms and conditions: ❌ Page not set
Theme

Name: Storefront
Version: 3.5.0
Author URL: https://woocommerce.com/
Child Theme: ❌ – If you are modifying WooCommerce on a parent theme that you did not build personally we recommend using a child theme. See: How to create a child theme
WooCommerce Support: ✔
Templates

Overrides: –
Subscriptions

WCS_DEBUG: ❌ Yes
Subscriptions Mode: ✔ Live
Subscriptions Live URL: https://kelwoo.test
Subscription Statuses: wc-active: 11
wc-expired: 3
wc-on-hold: 9
wc-cancelled: 4

WooCommerce Account Connected: ✔ Yes
Active Product Key: ❌ No
Custom Retry Rules: ✔ No
Custom Retry Rule Class: ✔ No
Custom Raw Retry Rule: ✔ No
Custom Retry Rule: ✔ No
Retries Migration Status: ✔ Completed
Report Cache Enabled: ❌ No
Cache Update Failures: ❌ 3 failure
Store Setup

Country / State: United States (US) — Hawaii
Subscriptions by Payment Gateway

other: wc-on-hold: 2
wc-cancelled: 2

Stripe: wc-active: 11
wc-cancelled: 2
wc-expired: 3
wc-on-hold: 5
Payment Gateway Support

Stripe: products
refunds
tokenization
add_payment_method
subscriptions
subscription_cancellation
subscription_suspension
subscription_reactivation
subscription_amount_changes
subscription_date_changes
subscription_payment_method_change
subscription_payment_method_change_customer
subscription_payment_method_change_admin
multiple_subscriptions
pre-orders

Check payments: products
PayPal Checkout: products
refunds
subscriptions
subscription_cancellation
subscription_reactivation
subscription_suspension
multiple_subscriptions
subscription_payment_method_change_customer
subscription_payment_method_change_admin
subscription_amount_changes
subscription_date_changes

Square: products
card_types
customer_decline_messages
payment_form
authorization
charge
charge-virtual
capture_charge
refunds
voids
customer_id
tokenization
add_payment_method
token_editor
subscriptions
subscription_suspension
subscription_cancellation
subscription_reactivation
subscription_amount_changes
subscription_date_changes
multiple_subscriptions
subscription_payment_method_change_customer
subscription_payment_method_change_admin
pre-orders

Cash on delivery: products
Square

Environment: Production
Tokenization Enabled: ✔
Debug Mode: Save to Log
Action Scheduler

Canceled: 2
Oldest: 2021-01-27 11:10:58 +0900
Newest: 2021-02-05 15:45:21 +0900

Complete: 2,553
Oldest: 2021-01-19 16:29:28 +0900
Newest: 2021-02-19 16:24:15 +0900

Failed: 4
Oldest: 2020-11-12 17:53:12 +0900
Newest: 2021-01-12 10:59:13 +0900

Pending: 23
Oldest: 2021-02-19 16:25:09 +0900
Newest: 2022-01-20 14:00:39 +0900

[phillipcornwell]

another report on 28402396-hc

Also found that PayPal Checkout isn't in the list of compatible payment gateways: https://docs.woocommerce.com/document/pre-orders/#section-20