Bed blocks do not render when you are more than 64 blocks away from them (in a spherical radius). This can be okay for certain in-door configurations, but if you use a glass wall or have a bed on the outside, this can be a big annoyance.

This is directly caused by MC-122532 being "working as intended". Despite that issue being "working as intended", beds being invisible from 64 blocks away is definitely not intended.