There is a problem on mobile: when you type a keyword in the form, suggestions appear, and cause the numeric keyboard to close before a choice has been made, which creates display problems.
The numeric keyboard should not close before a choice has been made (either “enter” to have the search results, or the choice of one of the suggestions)
The numeric keyboard no longer closes, but there is still a problem: when you close the numeric keyboard, the form returns to its original position, but not the suggestions. They remain in the same place as before the numeric keyboard was closed, which creates display problems.
I honestly don’t know, as I would have to see the issue first. The table-cell vertical alignment method can be problematic on some devices. If you can, try using the flexbox instead: