White rectangles after connecting one tab to the other

**Description of the issue: **
Every time I connect one Brave tab to the other white rectangles appear on the desktop and they stay even after closing Brave. Only terminating the brave process in taks manager closes them. After reopening closed tabs, brave spams with them.

How can this issue be reproduced? .

  1. Open two brave windows
  2. connect one to the other

Expected result:
Nothing should appear on the desktop.

Brave Version( check About Brave):
v1.70.123

Additional Information:
Link to the video what does it look like: https://drive.google.com/file/d/1S0XGDAC2RCB9uzFe5rQZA3lxQAJdOnOT/view?usp=sharing

Please clarify that process; thanks.