Good news; for those still wondering, in Infested mines cleared AFTER the patch, I have successfully observed royal jelly respawning reliably after 9 whole days.

Keeping track of this somewhere might be a good idea, as you can collect another round of jelly from each post-patch dungeon every ninth day.

I have 2 eligible mines so far that yield together 45 jelly on this 9 day interval. I would very much like to see if anyone else has seen similar or other timings.