Description of the issue:
How can this issue be reproduced?
tab loads fine
Brave Version( check
Version 1.32.106 Chromium: 96.0.4664.45 (Official Build) (64-bit)
tab becomes unresponsive, task manager shows the tab staying 100+ CPU
The issue can be mitigated by disabling Brave shield on the site. This is happening on quite a lot of sites
Ubuntu 20.04 LTS