Hello Neal,
Ah, I see what you mean! The description is indeed not being saved and does not override the content in the tooltip for the event.
I’ve opened a ticket for the in our system for us to work on. I am not sure when we will be able to release a fix, but I will mark this thread Pending Fix in the meantime and will certainly follow-up with you directly in this thread when there are updates to share.
Sorry for the trouble, but I appreciate you bringing this up!
Geoff