Map won't load intermittently, 'Uncaught (in promise)' error in console

[jrrdnx]

Description

On random page loads, the map will fail in loading. On each of these instances the following error can be found in the console (I've replaced my Google Maps API key, but it's there and is valid):

Uncaught (in promise) 
ge {message: "init_mapc7a2366f519a9e676c4bfcc294026f4f is not a function", name: "InvalidValueError", stack: "Error↵    at new ge (https://maps.googleapis.com/m…=init_mapc7a2366f519a9e676c4bfcc294026f4f:146:118"}
message: "init_mapc7a2366f519a9e676c4bfcc294026f4f is not a function"
name: "InvalidValueError"
stack: "Error↵    at new ge (https://maps.googleapis.com/maps/api/js?key=[[MY_API_KEY_HERE]]&callback=init_mapc7a2366f519a9e676c4bfcc294026f4f:70:72)↵    at Object._.he (https://maps.googleapis.com/maps/api/js?key=[[MY_API_KEY_HERE]]&callback=init_mapc7a2366f519a9e676c4bfcc294026f4f:70:182)↵    at Nj (https://maps.googleapis.com/maps/api/js?key=[[MY_API_KEY_HERE]]&callback=init_mapc7a2366f519a9e676c4bfcc294026f4f:146:233)↵    at https://maps.googleapis.com/maps/api/js?key=[[MY_API_KEY_HERE]]&callback=init_mapc7a2366f519a9e676c4bfcc294026f4f:146:118"
__proto__: Error

Steps to reproduce

1. Template created with Maps tag:

{% set mapCenter = 'Maidstone, UK' %}
{% set mapOptions = {
	center: mapCenter,
	markers: [{
		location: mapCenter,
	}],
} %}
{{ craft.maps.embed(mapOptions) }}

2. Refresh the page. Most of the time the map will load fine, but occasionally it will be absent and the console shows the above error.

Additional info

• Craft version: 3.6.4.1
• Maps version: 3.9.0.2
• PHP version: 7.4.11
• Database driver & version: MySQL 5.7.32
• Other Plugins:
  • Amazon S3: 1.2.11
  • Cookies: 1.1.12
  • CP Field Inspect: 1.2.4
  • Embedded Assets: 2.4.5
  • Feed Me: 4.3.5.1
  • Freeform: 3.10.6
  • Mix: 1.5.2
  • Neo: 2.8.18
  • Redactor: 2.8.5
  • Redirect Manager: 1.1.1
  • SEO: 3.3.30
  • Super Table: 2.6.7
  • Typed link field: 1.0.24