Edge Beta channel - favorites not syncing properly.

Alex Agranov "... when I close Windows browser and re-open it starts re-populating previously deleted favorites ..."

I ran into this issue yesterday, and it was crazy-making.   It was not a sync issue, but instead a corrupted Edge Chromium install issue.  I've got it solved this morning, but it was ugly.

Try HotCakeX's suggestion -- that's the standard way to deal with failed sync issues -- but if you continue to have the "re-populating previously deleted favorites" issue after doing what HotCakeX suggests, let us know, and perhaps my experience will be of help.