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Not sure if this has been brought up but the priorities seem to switch themselves off if you have one of them switched off on a profile group.

For example, on profile 1 I have my workers, set them to only gather food and not fight.
Switch to Profile 2 which has my warriors, set them the opposite (No Gather, Fight Only)
Switch back to profile 1, but priorities have been set on "Don't do"

They're discussing this issue in this thread here!