I have noticed that ever since 1.16 came out on Nintendo Switch that whenever you collect a large amount of experience orbs the game slowest down for several seconds until you collect that majority of them. This was not happening previous to 1.16 as I would gather large amounts of exp from my guardian farm and not experience dropped frames. I have also had all game settings to max including 14 Chuck render distance, 8 Chuck render distance, and fancy graphics on. I think the dropped frames is due to poor optimization for the Nintendo Switch.