Originally Posted by Zandel

I have noticed that after 3-4 runs of the event boss the list does refresh. I thought it was refreshing per boss but it seems to be a constant 3-4 runs.

Nah it depends on how quickly you do them. If you mash the skip button, you can get like 8 runs in. You basically get a couple minutes before the helper goes on a timeout. I'm assuming they tuned it for regular missions that last longer than that.