Expandable area resizes back after compile

Hello there,

I got a strange issue with my expandable area. As you can see in the pictures, the area is getting bigger if I compile the blueprint. I have an animation that slowly expands it, but I want it to be small at first of course. Oddly, if I check the Is Expanded boolean, it gets smaller, although it was in the not expanded state when I created the animation…And if I run the game, it is expanded and it automatically plays the reversed animation, although it is only fired on expanded change.