Nidtendofreak
Smash Hero
Specifically in TV mode. Started in the World of Light mode, its starting to get pretty bad. After a few fights its out by a full half second if not longer, and the desync sticks in the Switch's main menu as well. Have to fully shutdown the Switch and boot it back up to resync the sound. Doesn't happen in handheld mode, doesn't happen with Mario and Rabbids or Mario Odyssey so I don't believe its a problem with my TV set up.