I’ve been using Syncthing on Linux, Windows and Android. No idea which one, but apparently, one component in this chain auto-disables simple file versioning. Not only that, on top of that it also deleted all versions stored in the .stfolder directory.
It also just so happened that the synchronization fucked up so badly that it decided to overwrite the current with an old version.
Honestly, do with this info whatever you want… This was the straw that broke the camel’s back. The constant sync conflicts were annoying as is, but the file versioning being completely unusable on top of that, and deleting old versions… Sorry, I don’t trust this crap anymore. Will be looking for alternatives.