Nah. They're not alone. For me, syncthing would just randomly decide an updated file conflicted; I had two computers and a smartphone and was pretty careful about this stuff.
It was its only fault - but it was easier to figure out what the actual most-current file was.
Nextcloud does the same thing occasionally, and it's not intuitive at all trying to figure out which one is the proper one to keep.
Much like forest fires, only you can prevent conflict files.