Seems like the gui dont either like my screen size or gui size at large maybe the best action would be to lock a gui size while in this menu or something along these lines

also you should link your github so it shows a issue button on your curseforge project

Oh, well thank you for reporting this. It's my first mod, such issues can happen. 😄
And also thank you for letting me know, that I'm able to put a issue-button on curseforge. I'm also new to that 😀