could you add work types for sleeping and reading as well?

Just released an update. You can check the changelog for details.

Right now, they finish their current recreation before switching to other work, because the check interval hasn’t been set. If the check runs at the same interval as other work types, pawns tend to bounce between recreation sources or repeatedly stop and restart the same one.

In the next version, you’ll be able to toggle this check or adjust its interval. The feature’s done. I’m just finalizing a good default value.

Do they finish their current recreation when they get work to do during recreation, or do they stop and go?

@VitaKaninen Yes to both.

How does this interact with the schedule tab?
If they are scheduled for recreation, but are not prioritized in the work tab at all, will they still recreate?
If recreation is their highest priority, will they do it all day long if they are scheduled for work?

Pretty smart mod, assuming it doesn't conflict with Work Tab, Complex Jobs, or Many Jobs.
This way, you can always switch the priority of every task down, and have Recreation at 1 to make sure they're destressing.