Hi @stefanfrede,
Thank you for reaching out and welcome back to Netlify’s Support Forums!
I believe the solution is in our Support Guide here:
- You’re using some kind of server side rendering to render the endpoint. For example, if you’re rendering the page that you’ve set as the endpoint using a serverless function, you’d not seem the submission in the UI. The solution is similar, set the endpoint to a page or an asset (like
/favicon.ico) that already exists.
Could you look that over and give it a try?