How do I disable automatic library sync?

Is there a way to stop Lutris from automatically synchronizing the whole game list from the site? There’s way too many to navigate comfortably and it breaks the import feature (game that’s imported from local Steam install won’t show as installed because while I was importing it Lutris sneakily included it in the game list as an uninstalled one and won’t accept imports anymore).
In a previous version I’ve been using until recently there was no such problem, now I have to deal with this annoying “feature”…