The GUI is glitching with ExtraPlanets (I've only tested it with this addon). Idk if this is also with other addons. (Addons that i use: Extended Planets, extra planets, more planets.)
https://youtu.be/_3JDqQ7IwiE

Disable our galaxy map or EP galaxy map in config.

I've disabled it in ExtraPlanets and it works thanks.

And i have a question. Is it normal that i can't place leaves, seeds, gras and water on the moon? And if yes, can i disable it or how can i make that i can place it there?

Sealed region and add thermal control on Oxygen Sealer.