While looking at possible options for circuiting inputs to control the consumption of workers. I realised that the depot is deploying everyone in it. I believe this is due to an adjacent container house with the taskforce option selected but I would have expected that to only deploy military units.

If I cancel the taskforce option on the house it appears to resolve that issue but then in short order I get hit with this:

The mod Colony Builder (0.2.5) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event ColonyBuilder::on_tick (ID 0)
LuaEntity API call when LuaEntity was invalid.
stack traceback:
[C]: in function 'index'
__ColonyBuilder/script_libs/script-colony.lua:1463: in function '?'
ColonyBuilder/script_libs/script-ticktasks.lua:27: in function 'resolve_tick_tasks'
ColonyBuilder/control.lua:63: in function <ColonyBuilder/control.lua:62>

I'm no programmer but reading that it looks like something related to the taskforce isn't being properly cleared along with the job.

Let me know if you require any further detail.