Can't sleep in house because mob glitched

I play on a server and my house is pretty big, usually, we don't sleep because there are too many players. Today there were just 3 and we were sleeping normally, that is until I couldn't sleep because of a mob nearby; "Oh well just got to kill the mob then sleep, easy as cake" well no because there were NO MOBS nearby. I searched all around my house and there was no mob anywhere, checked the roof for spiders or the walls for climbing ones, nope; dug underground to check if there are spaces where mobs spawn, nope. I brought a friend to help me out with creative and even he is confused. For some reason, I could sleep outside the house, hell my friend built 2 blocks off the house and I could sleep there? Using plugins he moved my house 6 blocks to the north and I could sleep in the area that's to the north, but the zone my house used to be is "haunted" to say the least