Tracking/Blocking protections are not always disabled when Shields are turned off

[Brave-Matt]

Description

Possibly related issue here
Sometimes connections/calls are still getting blocked by Shields even when they're disabled.
Additional info courtesy of @jonathansampson:

The 412 is unrelated.
The page is attempting to redirect us to accounts.google.com.
That attempt gets stuck in the pending stage.
Likely due to our blocking. The initial call to accounts.google.com gets a 307 Internal Redirect, meaning the browser is redirecting the traffic. The call is still made, but never finishes. It just sits in the pending stage.

Steps to Reproduce

1. Visit http://appinventor.mit.edu/explore/#
2. Click the "Create apps" button on the top right
3. Toggle Shields on/off

Actual result:

Page doesn't fully load, remains blank (but not an actual blank page).

Expected result:

Page should load and app creator (or something like that) should display.

Reproduces how often:

Easily

Brave version (brave://version info)

Release build, v0.56.12

Reproducible on current release:

• Does it reproduce on brave-browser dev/beta builds?
  Yes

Website problems only:

• Does the issue resolve itself when disabling Brave Shields?
  No
• Is the issue reproducible on the latest version of Chrome?
  No

Additional Information

Short clips of actual vs expected behavior:

Chrome:

Brave:

Console output:

Network Tab:

[jonathansampson]

Similar issues when using Ghostery: matomo-org/matomo#13018

[Brave-Matt]

OG reddit post:
https://www.reddit.com/r/brave_browser/comments/9ylgf3/website_not_loading_http_412/

Also worth noting that the site functions as expected in Private window

[Brave-Matt]

+1 from Community I think? Hard to tell but given that this works in dev (see report) and no shields config, global or domain-level, has any effect this seems to be the culprit:
https://community.brave.com/t/bitchute-com-links-are-not-working-https-www-bitchute-com-video-5jnvhpmzpxrd/39715/6

[aghodsi]

Hi,

I was the original reporter of this issue (on reddit). Just wanted to report that this seems to be resolved on the latest beta Version 0.59.21 Chromium: 72.0.3626.28 )

[tildelowengrimm]

@brave/legacy_qa Can you verify?

[LaurenWags]

@tomlowenthal worked for me with the following build

Brave	0.59.21 Chromium: 72.0.3626.28 (Official Build) beta(64-bit)
Revision	997b1040b63bac324e815797ba52be0cd8f616ed-refs/branch-heads/3626@{#461}
OS	Mac OS X