Second Brave Window opens and flashes on and off

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Description of the issue:
How can this issue be reproduced?

1.Open Browser
2.second browser window opens without any action
3.second browser window flashes content (pages in FVD speed dial bookmarks)

Expected result:
no second window
Brave Version( check About Brave):

Version 1.26.74 Chromium: 91.0.4472.124 (Official Build) (64-bit)

Additional Information:
I can try another speed dial but prefer FVD

EDIT: I am turning off auto update on FVD which updates thumbnails of bookmarks. That may fix it