Setup: I created a village in a survival (Realms) world by "importing" two Villagers from an existing village and then starting a new village in the middle of nowhere. I gave these two Villagers their own names through the use of a Name Tag and let them create 5 new Villagers in this new village, who all remained nameless due to the lack of a Name Tag.

Bug: Since I am still building the village, I am constantly moving the beds around. The 5 new Villagers all have no problems with this and can find a new bed when night falls. However, the two "imported" Villagers just stay standing around at night and don't even move at all. Only when I place a bed really close to them will they find it and sleep in it.

Observations: It seems that the detection range of beds for normal Villagers is around 42 blocks (taxicab distance in all dimensions), but the imported Villagers stop detecting around 8 or 10 blocks. I haven't tested the detection range of Job Site blocks for the Villagers.

Speculation: It is no coincidence that these two Villagers are the ones who have trouble. I imagine it is either the fact that they originally came from another village or the fact that they've been named. I don't have the resources to easily test different cases.