Elements overlap on mobile
Beyond a certain minimum height, many elements have a tendency to start overlapping. See: press submit button vs. press text, or press list vs. the footer.
This is probably flexbox's fault, but a workaround is needed.
A friend complained that the site would not accept orders on an iPhone, but worked fine on an iPad. Possibly the issue is related to this one? Sorry, I don't really have any more details.
#26 covers an order input bug that may be causing your friend's issue. It's ready and I may have to keep this release small to get it out ASAP.
It's possible this could contribute. In my experience it is more of an annoyance than anything. When it shows up in press it can making working with text extremely hard. That's about it.
In any case, always feel free to create a new ticket. The worst that can happen is I close it as invalid, right?