Villagers will not path to beds which are in adjacent chunks when they have only one option to move to. They will path correctly if they are not on the chunk border. 

Build contraption as shown, there are strings over the beds so that when they wake they are forced onto the glass block. Note chunk border position. Only one of the 3 villagers will path to a bed. Moving the structure into the chunk makes it work correctly.

First image shows issue, second shows same build working correctly when not on a chunk border.