I get intense lag on my iPad 10th Gen whenever I fight another player in a multiplayer world or server. The lag usually occurs in spikes whenever I look around or move quickly while having a keyboard and mouse connected via Bluetooth or wired, but only when fighting. I tested fighting on a 2-player flat world without entities on the lowest in-game settings and half of my iPad internal storage empty, but the lag persisted. The lag appears after a few minutes in a newly created world.