TYPO3 Core

Hello,

I'm having some weird behavior at Mask.

I have created a new element in Mask. Then I created the "repetition" element and specified that the element may reference a maximum of 4 elements (Screen 1 + 2). In the repetition I have created a picture element.
Now I use the element and I want to create 4 boxes. While clicking on the “neue Box“-button for the fourth time all image buttons disappear, so I can’t select any images. (Screen 3)
The “neue Box“ button is still there but doesn’t work anymore. I think the button should not be there after I have referenced the last element. It feels very much like a core TCA bug.

Thanks in advance for help and feedback.

Best regards
Kai Grosz