Alright I got this solution confirmed. Will take a look.

It is because "Out of Combat Abilities" behaviour has always priority over "Need Satisfaction" behavior,
so if they can heal anyone no matter which need they satisfy right now they will interrupt it to heal allies.
However this can look odd under some circumstances, like when sleeping.
@Josh I am going to make "Out of Combat Abilities" fail when a unit is right now in its bed or right now working on a triggered job (eg. brewing a potion or channeling a ritual) or when the unit was recently drop-assigned to work on something, so that the "Need Satisfaction" behavior can complete its current thing before applying any Out-Combat-Abilties.
You're fine with this fix?

When you hover the prison with the hand, does it the tooltip tell there is still space for more prisoners or is it full?
It might be that your prison is full already, in which case workers stop bring new enemies intentionally.

They should be able to pass locked enemy doors, but not your own locked doors.
If they can not get out of enemy locked doors it would be a bug.
Would you mind making a video or at least a few screen shots to explain when and how it happens?

@Josh they will want to get payed on payday, however if they are part of the Empire faction they would not complain until converted, then they will get unhappy if not payed.

Does it happen on all maps or only on larger (custom) maps?

It could well be that you run out of memory when you play with only "RAM: 4.00 GB" installed.

The problem is that 4GB is only enough for campaign maps and small to medium skirmish maps, which are integrated with the game.
However since you have only 4GB installed and Windows does already occupy around 1GB and then other applications might take even more, there might be not enough left to run the game properly.
Ideally the game needs at least $GB usable memory to play but we recommend 8GB to play large custom maps.

What could help in this case is to close other applications using a lot of memory.
To figure out which applications doing this, open your task manager (right click on the task bar at the bottom),
go to "Processes" tab and click on the "Memory" column header to sort processes by their RAM usage.
Try to close all not needed other processes which use bigger chunks of RAM while playing the game.
Other then that, lowering resolution and texture quality can help to reduce RAM usage as well.
Also when you finish maps fast without building extremely large dungeons/armies it wont use that much RAM.

I hope this helps.

Cheers

I just wonder if people are confused when the gold vortex is inactive but the tooltip does not tell.
Maybe it would be better if it says "Vaults full" instead of "Inactive".