I have two infested mines I have cleared after the update, and both respawn royal jelly after 9 in game days, so far, I have yet to see any mobs respawn; this has made me a little sad, because I was also hoping to have a reliable source of clots. Though to be fair, I've been running into a LOT of gjalls still, so I've got clots for days.

I may still kidnap a gjall and stick it in an enclosure to farm ticks though.