KI Preset Masken werden nicht übernommen! Ich bearbeite das Bild und im Bibliothek Modus sowie beim export übernimmt er mir die Maske nicht!

Unfortunately you haven't given us any information about your system. Therefore, all proposed solutions are a look into the crystal ball

What do you mean with “Meine KI preset Maske wird teilweise nicht übernommen” (Engl.: My AI preset mask is sometimes not being applied.) Please be more detailed.

Does this only affect on AI masks or also other masks? What happens with the other editings?

First try to reset the preferences of Lightroom Classic:  How to reset Lightroom Classic preferences (adobe.com)

It's recommended to backup your preferences before you reset the preferences to the default settings: https://helpx.adobe.com/lightroom-classic/kb/preference-file-and-other-file-locations.html

If this doesn’t help, please provide a copy of your 'System Info'. This can be get from the Lightroom menu item Help > System Info. There's a copy button in the System Info dialog. Press this button and paste the info into your next forum post.