Second: What is the user that owns the Syncthing process?
Third: What rights does that user have to the /Paragon directory?
The answers to those questions will likely result in the answer to your Syncthing issue. My best guess is that you need to use Ignore Permissions and grant the user that owns the Syncthing process access to those files.
I know in the end this will be something minor that I missed somewhere, after all everything else is working fine in the same universe. I’m just hoping someone here can give me a clue as to what to look for. Have a good night and thanks again