I had a similar issue recently (Non-existing files stuck on "Out of Sync Items" - #21 by imsodin) with a sync folder between Mac and Windows (also using synctrayzor). Not sure if it will solve your issue, but it’s worth a shot.
TL;DR:
I had a similar issue recently (Non-existing files stuck on "Out of Sync Items" - #21 by imsodin) with a sync folder between Mac and Windows (also using synctrayzor). Not sure if it will solve your issue, but it’s worth a shot.
TL;DR: