Trying to sleep at night while a monster is nearby, doesn't set the spawn point of the player.
MC-167989
Spawn point is not set when monsters are nearby
Resolved
Fixed
2
Confirmed
Normal
Parity, Player
1.15, 1.15.1, 1.15.1 Pre-release 1
20w06a
Retrieved
Have you tried setting it night and then try it again in day, just to see if sleeping helps fix the problem?