Description of the issue: As long as Cross-site cookies get blocked via Brave Shields, one can not use the feedback function on https://burnermail.io/.
Exact URL of the website in question: https://burnermail.io/
Did the issue present with default Shields settings? yes
Does the site function as expected when Shields are turned off? Yes
Is there a specific Shields configuration that causes the site to break? If so, tell us that configuration. (yes/no): Cross-site cookies blocked. If changed to All Cookies Allowed it works again.
Does the site work as expected when using Chrome? Don’t have Chrome but seems entirely irrelevant in this case.
Brave version (check About Brave): Version 1.5.122 Chromium: 80.0.3987.162 (Official Build) (64-bit)