Hi Marcel,
Sorry for the inconvenience caused to you.
We have analyzed the reported issue for “the header and footer of the popup is not fit within the bound of the Corner radius”. We can reproduce the reported issue and we will fix the issue and the fix will be included in the 2018 Volume 3 SP-1 release, which is expected to available by month of October 2018. We appreciate your patience until then.
Regards,
Vigneshkumar R