Hmm... it requires full sync if you edit the fileds of template.

In the past it required full sync due to conflict but in the last ~2 years (maybe) I haven't run into such probelm (I guess periodic sync in the background eliminating to much of a backlock probably helps)

Last time it asked me to do a full sync when I changed a single card to use a different template (because I had mistakenly used a wrong template when creating it). The fact that everyday sync works perfectly is still mighty impressive though.