Program Menu appears in side panel

Hi.
I am using KDE Plasma X11 (not Wayland) on Fedora 40. I have made two side panels where I put starters for programms I use frequently. Fine.
Now I have the issue that some programs, like LOF,or Kdenive, put their menu buttons into that side panel and not in the program GUI.
Is that supposed to be like that? It is definitely not an improvement. How can I stop it and get the Menu bar back into the program GUI?
Thanks for any help offered.

List what widgets you’re using. I have a hunch it one of them.