I have multiple villagers placed in a room to trade with and there are a few who won't connect to the beds. I can pick it up and put it back down and they still won't connect. I have even moved them and that one area will not connect with a villager. But can move the bed 6 blocks away and its just fine.
MCPE-190329
Villagers not connecting to bed or workstations
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You need to destroy all beds, and then you must place the bed where you want your villager.