Now here's a really weird one for you. Multiple Pokemon Sword and Shield players have found out that the game is messing with their Roku devices, of all things. Turns out Pokemon Sword and Shield's Y-Comm feature, which is constantly searching the internet for other players, is sending out data packets that confuse the Roku, causing it to get stuck in a boot loop. The only fix right now is to turn airplane mode on on your Switch, or move your Switch or Roku to a difference wireless network.
Roku is aware of the issue, so it seems like they're going to offer some sort of solution in the future. As far as we know, Pokemon Co. hasn't commented on the matter.