Moving cursor when typing sometimes shows a different tab until you resume typing

Description of the issue:
Sometimes when typing in a text field, if you try to move the cursor, the keyboard will stay up but the rest of the page will display another open tab. For example if I am on twitter.com writing a tweet, and try to move the cursor (by tap/hold/dragging in the text box), and have reddit open in another tab, it will show the contents of the reddit tab above the keyboard. As soon as I start typing again, or tap the visible page, it returns to what it should be.

Note that this is inconsistent, but happens fairly frequently (4 or 5 times a week). Once it happens it happens consistently on that page at least until reloaded, and often continues to happen on various pages for a while (an hour or so maybe, I don’t have exact statistics).

How can this issue be reproduced?

  1. Have multiple tabs open
  2. Type some text into a field on one of the tabs
  3. Try to drag the cursor to edit some already entered text
  4. Get lucky and have bad luck as this isn’t consistent
  5. See content from a different tab displayed
  6. Tap the screen or try typing and see it go back

Expected result:

You can see the cursor move because it keeps displaying the current tab

Brave Version( check About Brave):
Brave 1.15.75, Chromium 86.0.4240.99

Mobile Device details
Android 11; Pixel 3 XL Build/RP1a.201005.004

Additional Information:

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