Text is disappearing in SU 2024

Since the upgrad to SU 2024 text is disappearing as soon I push enter. First I thougt it’s a problem of the model. Then I tried a new model from scratch using a simple rectangel. The textbox appears with the area information and even the arrow is shown. But after pushing enter or clicking next to it it disappears.
Intrestingly text made by SU 2023 are shown but as soon as I’m editing again same thing.

If sombody know whats going on here I would be happy.

Thanks in advance for some advice.