Files sees an app trying to access the file, pings NextCloud to say "yo, is this sh* up to date?" What does it do if you're not connected? Don't mind it check

Files sees an app trying to access the file, pings NextCloud to say "yo, is this sh* up to date?" What does it do if you're not connected? Don't mind it checking whether the local copy is up to date, but I'd be concerned if the sync trigger is you opening the app.