Ok seems to affect old villagers converting to new mechanics. This is being played on realms 1.11. 

First day put composter and bed in existing wheat, carrot and potato farms. At first villagers 3 of 4 converted to farmer. 4th one turned to cleric i think. The brewing station is several blocks away on x,z and 30 or 40 blocks on the y. Through solid blocks. Then game crashed. Had to restore from save. Will not connect with composter.

Put composters in upper iron farm around y 120. Some changed. Some 60 to 80 blocks on y turned. Again no visual possible and no path to composter.

Creating new trading area to try and salvage old villagers. Have moved a few. They will not connect with composter even if standing in it. And will not sleep in the only bed available to them. 

Tried this with same world local. In creative killed off old villagers for the most part. Spawned new ones with eggs. Seems better but close to half will not use a open bed they can reach. 

Please fix.