ugh, I can't delete my events either, super-annoying

ok.. i see i'm not alone with this problem :/ i hope they will fix it soon

You also can't change your pets' orders, too. I'd like to move my pets around and finish my battlequests sometime soon.

I've found that if you have the challenger unlocked, you can go to the main battle page to battle them and it works fine, but it doesn't help when you don't have the challenger unlocked, or it's a seasonal/cash shop opponent. -is stuck on a cash shop opponent-

Apparently going to your user dashboard page makes it possible to delete them but it is a PITA to do so.

I also can't delete events, it's nice to know I'm not alone at least (If it helps the staff figure things out, I'm using the latest version of Google Chrome)

I'm using Firefox at the moment, but also tried Explorer and Edge. The issue happens with all three of these for me.

yeah, like everyone else i can't delete events either. using chrome as well

Also not deleting on Chrome...hope they find a fix before my whole sidebar is full. :P