First off, thank you so much for getting in touch about your slider not working on mobile. I imagine that is not what you were expecting, but I’m happy to help!
I was able to create a clone of your project and reproduced the same issue that you’re experiencing. This definitely looks to be odd behavior.
After reaching out to the team, and found that this is a bug that you’ve come across. The issue seems to be occurring because the slider is set to display:none on page load.
Currently, this should only affect when resizing the browser, though should not affect users that access the page on mobile initially