Villagers either don't sleep or don't wake up

We have a long time world that was originally created on android in 2017, moved to win10, and finally put on a realm.   it's currently a bit under 400mb.  Sometime during the 1.14 release, all the villagers in the game got  a permanent case of insomnia and narcolepsy – the ones that are awake never sleep, the ones that are asleep never wake up. 

I don't remember when exactly it happened, but when we noticed we restored from what should have been working backup and nothing changed.  We decided to wait for 1.16 as there were a number of reported villager bugs and nothing has changed

 

I downloaded a copy of the realm to windows 10, switched to creative mode for some debugging.  Here's what we've found:

 

• villagers everywhere have this problem, if I teleport to somewhere completely new and find a newly generated village, the villagers are stuck in the same locked cycle (usually awake and wandering around)
• This affects villagers that were naturally generated, bred, summoned, and spawned froman egg 
• villagers are able to link to both beds and workstations.  we have a trading hall setup in the middle of nowhere – about 200 blocks away from the nearest village (all our previous trading halls in the main areas kept having link issues
• setting the time manually or waiting out the time makes no difference.  
• narcoleptic villagers
  • if i break their bed, they wake up and sometimes walk, but never restock with their workstation
    • placing a new bed they'll immediately link and go to sleep if they can pathfind to it
  • if I trade with them, they'll wake up for the trade then go immediately back to sleep
    • if I can quickly break the bed before they get back in, they'll still immediately link to the next placed bed and go to sleep. 
  • wake up if take damage from me, mob, or environment (fire, blocks)
  • turn into witches if lightning'ed
  • if i ring the bell, they'll all wake up, look around for a bit, then go back to bed
• insomniac villagers
  • link to any workstation and bed placed in range
  • relink any number of times to workstations and beds
  • never restock their trades
  • turn into witches if lightninged

Other village mechanics like iron golems and cat spawning seem to continue, but not as quickly as before.

I have tried switching modes (survival, creative, adventure) and difficulties (peaceful, easy, etc).   we have a command block for single person sleeping and i've tried with cheats enabled and disabled, command blocks toggled, breaking the command block, and pretty much anything else I can think of.  

Attached are some screenshots taken in the trading hall.   

I can't reproduce this in a new world, 

 

This doesn't seem related to existing bug reports i've seen as linking works very consistently in a controlled environment (the trading hall), there are no nitwits involved, and it consistently affects each villager across versions and platforms.

 

appreciate any assistance