Can't leave event/change category

Hello!

I accidentally signed up for an event in the wrong category and was unable to change that from both Mobile Link, Zwift for iOS, and PC. In Mobile link it doesn’t let me unselect the category and in Zwift I am able to click “leave” in the event module on the top right corner, but it probably doesn’t update in the back end because it doesn’t let me join in another category and the change is not reflected in Mobile Link app.

Is this a known issue? A few weeks ago I was able to sign up for an event and then change the category, now it doesn’t seem to work.

I’ve had the same thing happen to me a couple weeks ago. 

I also have this problem, if I sign up for event on ZML I cannot untick event if I chose to do another ride?