[TYPO3-mvc] invalid form submit empties all filled out input values

[Domi]

Hello All,

I am setting up a basic form for my extension. Everything works, after 
submit the validation kicks in. But: if some input fields fails all 
already filled out fields are empty again, which is very unpractical for 
the frontend user.

Is this default behaviour or is there any mistake I could have set up? I 
make use of the multiple steps form validation of Sebastian, maybe there 
is something to adjust?


Thanks for advises

Dominic