On iOS, there’s a problem where the page automatically zooms in when typing in the address input field while inviting to a group, as well as in some other input fields.
You can’t zoom out, which makes it impossible to press the “Save” button. Scrolling down or to the right also doesn’t work.
The only workaround is to zoom out each time, and it only works in Safari. I haven’t found this option in wallet built-in browsers.
Hopefully, this can be fixed in future updates.
M.I