Galaxy j7 sky pro

So, one of the big things I enjoy doing on Minecraft is building custom villages, in survival, by curing zombie villagers and building homes for them. In my current survival world, I had 6 villagers, 2 player built iron golems, spanning 5 homes. I left the village to work on automated farms in my base which is ~ 7 chunks from the village. I've left the world and rejoined multiple times, and decided to check on my village to make sure everything was good.

Note: Every block, save for roofs, was fully lit by torches, and the two golems were more than capable of killing the few mobs that may have spawned on the roofs.

When I checked on the village last, I had:

2 golems

1 cartographer

1 fisherman

2 tool smiths

1 butcher

and 1 baby, born from trading

When I checked, just now

I had lost BOTH golems, and my cartographer, due to them despawning for no apparent reason

That's 72 iron down the drain, and now I need to cure more white robes and HOPE I get a new cartographer.

The bug, tldr, is that mobs that should have the "persistanceRequired" tag despawn randomly, likely due to chunk reloading.

EDIT: It should also be noted the village has walls surrounding the entire perimeter, with fence gates blocking the entrance