RPM Iframe issue

Hi there!

So i integrated the RPM Iframe into my application. When loading this IFrame, the user will see the start screen of the iframe:

Now when klicking on “Konto erstellen” (create account) and selecting the back button i will get this screen:

When clicking on “Zurück zur Startseite” (back to Homepage) it loads the readyplayerme homepage what is absolutly not what the iframe should lead our users to.

i could not figure out how to solve this - the back button, etc. isnt accessable or returning any messages so i could redirect or reload the iframe - also observer didnt work due to cors policy.

has somebody a solution or idea how i could solve this big problem?

Thank you in advance!