Brave performance issue and whatsapp web

There are 2 problems that I have experienced so far.

Problem 1:
Description of the issue:
The browser consumes all my CPU Usage. Making the browser too slow to load all contents for about 5-7 minutes. I’m using core i3-3210 3.20Ghz. When I reload the page, it consumes 100% for all cores.
The browser even asked whether I would like to “wait” or “exit page”

How can this issue be reproduced?

  1. Reload the page with INSPECT. (right-click → INSPECT → Network Tab → All )
  2. There are other occasions which I can’t remember, but most of the time cause by INSPECT
    NB: to minimise this, I have to switch to “fetch/XHR” or “JS”

Expected result:
The browser should not load page for a long time when reloading the page.

Brave Version(): 1.80.115

Additional Information: Firefox browser not load as long as Brave browser

Problems 2:
Description of the issue:
Whatsapp web for viewing “contact info” is not working as expected.

How can this issue be reproduced?

  1. Login to whatsapp web through browser
  2. Click on any chat
  3. Click on 3-dot at the upper right corner
  4. Click on “Contact Info”

Expected result:
Showing information on contact

Brave Version(): 1.80.115

Additional Information: Firefox browser displayed information as expected