Native mobile click firing when hidden behind other element

[Erichero]

I'm using jQuery UI datepicker and Selectric together, and when the datepicker is opened across Selectric in native mobile mode, and I click on the datepicker calendar where it overlaps, it's opening the Selectric dropdown.

Any ideas on how I can work around this quirk?

I've got this issue open on StackOverflow as well:
https://stackoverflow.com/questions/53741395/jquery-ui-datepicker-conflicting-with-selectric-on-mobile