Whenever my prisoners labor in my prison, the game has lag spikes that are annoying to endure. All they're doing is mining in the quarry from the Quarry mod and harvesting crops from the various fields that I have (the mods include Vanilla Garden and its various expansions, in addition to vanilla crops in general).

When I unassigned them from their work, the lag spikes stopped. I don't know why this is happening since the whole point of the mod is for the prisoners to labor.

Can anyone help?