hover problem

I have created a hover effect that makes my buttons round when hovering them. It works perfectly in preview but not at runtime.

7921792--1011001--Screenshot 2022-02-23 at 23.31.46.png

When I start the app the button I have assigned the hover to get round immediately.

I guess I have a problem with the event system but can not figure out what.

Your setup seems alright, I don’t see any problem. I don’t understand what you mean by “the button I have assigned the hover to”. You’re assigning hover pseudo-states manually, not through moving the mouse over the elements? Maybe a bit more context could help us help you.