I am currently using the Supply theme for my store, but I have encountered a glitch only on mobile.
Whenever a product has more than 2 options to choose from, clicking on the drop down menu creates a glitch, and you have to click twice the same menu in order to choose an option; the first click results in the menu glitching.
The problem is only for mobile users, and reverting to the original code, yields the same error, which seems to imply that the code has some error.