Level 5 Jousting Arena

My level 5 jousting arena is not triggering monsters-upgraded for this event. Please help!

Thanks for reposting here. Pika couldn't see any issue with the Arena. Maybe store and replace next time it's ready for collection. Double check no other monster on your board. Music is a much better way to check than scrolling across your kingdom. Let us know if it's still not spawning.

I did try. It occurred to me she looked at my old kingdom. I'm currently playing under storm I'd neferlala kingdom stone bridge. Can she check that one?