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