Hi @felix-mueller, thanks for your fast reply 
Can you give me a hint which element the event listener should be attached to? The form element doesn’t work for me.
However, i’m not sure if the event listener would help me track down my problem, since the form submission is prevented, so this issn’t an issue for me.
I’ll try to rephrase my problem: If the form submission is prevented and the user fixes his input so that the form is valid and submits the form again, the submission seems to work (there are no errors) but the payload of the “submit-form” request is empty and no data is transferred to the server.
However, if the user enters valid data the first time (so submitPrevented is never set to true), everything works as expected and data is transferred to the server.
I really appreciate your help, thank you so much!
Best
Johannes