Synth knobs

Hello fellow unreal engine friends,

Im currently working on a project with a ui. And Im a little confused how the synth knobs work. Its purpose is to change a specific value, and it does it perfectly. Now comes the strange part:

As soon I touch it and move the mouse even a little it jumps straight to the lowest value. Also, it changes the value only if I move my mouse a lot to the top of the screen.

I’ve read every value and to my understanding, there is nothing I could have done to let it do something like that. Any ideas?

Thanks so much!