App Clip smart banner on Safari on iOS permanently hides when scrolling

We have an App Clip for our app that we promote on a webpage via a smart banner.

When we open the link on Safari on iOS 14 and scroll the webpage up, the banner is hidden, as expected. However this action makes it become "locked", if we scroll back down the banner does not scroll back into view, we can see it hidden behind the slightly translucent address bar.

If we rotate the device to landscape and then back to portrait, the banner "unlocks" and we can scroll it back to view.

This appears to be an issue with Safari, does anyone else have this issue or suggestions on a workaround?