What I expected to happen was...:
Sleep in my bed in Multiplayer (on joiner's device BTW the owner's device never slept)

What actually happened was...:
I clicked LEAVE BED and I spawned in the title screen, with the hearts on the top right and hot bar. THEN I clicked play and joined and it was all black, so I closed and reopened, and then I rejoined the server, then I was glitching up and down like you died from exploding high on MC, then I quit the game and removed it from multitasking. And it was fine

Steps to Reproduce:
1. On the device you joined the server on, sleep in a bed and click leave bed.
2. Spawn on title screen, close and reopen, Rejoin server START JITTERING
3. Close Remove app from multitasking, go back to server, It Cool Nothing's New