Jason Tenner

Updated to 1.14.3 today in Realms.  When I attempt to trade with villagers created in 1.14 and 1.14.1, the GUI opens and closes very quickly.  Before the upgrade, I had destroyed their workstations and moved them several hundred blocks away.  

It does not seem to affect newly bred villagers.

If it is related to specs, this is a massive problem because so many have reported the issue on Realms.  Each time this has happened in my world, it was in a location several thousand blocks from spawn near after exiting a nether portal.  I had a villager breeder in one area and a guardian farm in the other, so potentially lots of entities loaded.

This bug was occurring regularly in my Realms world at my underground base when I signed in or returned from the nether.  I tried adjusting my render distance from 10 to 12 yesterday and it has not happened since.  It did not fix the lights that had already been placed, but the bug has not occurred again after replacing the lights.

Perhaps a user using render distance 10 triggers the bug when the overworld is loaded, and the other users see the bug due to caching?

Also, I only have three slime chunks out of 16 in my base, but almost all of the chunks are affected.

After re-lighting my base on a Realm, the problem occurred again after I disconnected and signed back in.  I traveled to a guardian farm about 1000 blocks away and the lights were out there as well.

In both cases, the affected area was at y=5 and the sky light level was 0.  Even while standing on a platform of sea lanterns, the debug screen showed the block light level = 0 and mobs spawned on the sea lanterns.

Also experienced on Realms today.  Played every day in the past week since the release without incident after upgrading from 1.13.2.  My entire base is a gigantic mob farm now, completely unplayable.