Hey @DavidVerduzco,
Got it, so when you meant “thank you page” you meant your own thank you page on your website - hence the URL redirect.
With the form settings you have now, I don’t see why those subscribers wouldn’t be redirected to that URL you designed. Have you double checked to make sure that the URL inputted is an accessible page and inputted correctly?
If so, then this leads me to believe this behavior may caused by your website and should be investigated with your developer.
In my experience, I’ve seen this sort of odd behavior stemming from certain site errors or if your site directory isn’t set up correctly to accept that URL request. It might also be a good idea to review how your site handles redirects.
We also have an extensive network of Klaviyo Partners who specialize in development work that you could reach out to for further assistance as well.
David