It took me a little bit, but I figured out that I can\'t click on my inputs because of the touch.punch script I\'m using to enable jquery UI drag functionality on touch devices.
Thanks to @Danwilliger and @jeremytripp for the solution. Being that this issue has been known for years and yet has still not been worked into touch-punch author's Git repo, I forked it with the solution added here:
https://github.com/copernicus365/jquery-ui-touch-punch/blob/master/jquery.ui.touch-punch.js
I would be quite happy for the author to incorporate those few lines of a change into the original library and make this one unneeded then, but if that never happens, it's nice to have a single source file to reference.