Drop-down in form not showing custom labels

Your software
My Mautic version is: 5,0,3
My PHP version is: 8.1.27
My Database type and version is:

Your problem
My problem is: Since Mautic 5 a new created form will not show custom labels, but the ones of the mapped field from the database.

I.e. I have a field “gender”, defined in the database as male with the Label Male and female with the Label Female.

I created a new form in which I’m using this form. In the Properties tab I defined different labels i.e. Herr with the value male and Frau with the value female.

Unfortunately these labels are not shown, but the default ones from the database.

Kind regards

Christian