Hi Nick,
I’m afraid I cannot replicate the issue either. I’ve checked using an iPhone X (an actual physical device) as well as simulated devices using the Chrome dev tools. This is what I see from my physical device (the simulated versions are pretty much identical too):
If you’re still experiencing this issue, can you let us know the exact device(s) and browser(s) that are problematic? In addition to this information, please also provide your site’s login credentials in a secure note so that we can take a closer look at your set up. To add a secure note, click the key icon at the bottom of your post and enter the credentials in the modal that appears.
Hopefully you’ve managed to fix this in the interim, in which case you can just confirm that it is no longer an issue, but if it is, then provide the above information and we’ll do our best to assist further.