Unable to view https://reach.tech/router/tutorial/05-url-parameters due to cookies

[ryanbr]

Description

Missing elements on https://reach.tech/router/tutorial/05-url-parameters due to cross-site cookies being blocked.

Steps to Reproduce

1. With shields enabled visiting https://reach.tech/router/tutorial/05-url-parameters
2. ​https://codesandbox.io/ embed doesn't show because of cookies
3. Mostly a blank page in Brave because of cookies.

Actual result:

codesandbox.io embedded is missing

Expected result:

Show codesandbox.io embedded

Reproduces how often:

Easily, with default Shields

Brave version (brave://version info)

Version 1.4.95 Chromium: 80.0.3987.122 (Official Build) (64-bit)

Version/Channel Information:

• Can you reproduce this issue with the current release? Yes
• Can you reproduce this issue with the beta channel? Yes
• Can you reproduce this issue with the dev channel?
• Can you reproduce this issue with the nightly channel? Yes

Other Additional Information:

• Does the issue resolve itself when disabling Brave Shields? Yes

Miscellaneous Information:

Blocking cookies from https://codesandbox.io/ on this site causes issues, Allow all cookies in Shields fixes this.