I have only seen on issue like mine in the forum, but related to different OS. I have two Windows 10 that I used syncthing to sync my OS backups. Recently, I removed an archive and now one of the remote device showing that sync is at 99% and don’t go any further.
I checked each of the folder structure for any extra file or folder that might have not gotten scan but all look to be a complete replicate on both devices. All folders scan show up to day on each device.
I am on the latest RC version BTW. I am at a lost here.