Issues with portrait on mobile (skips the last slide and has very odd behavior)

Testing with an S7 Edge on Android Chrome:

Landscape in mobile works perfectly.

Portrait has this behavior when clicking Next on a 6 slide BXslider:
Starting at 1,2,3,4,5,4,5-1 and repeat. That 5-1 changes on its own from 5-1 after about a quarter-second. It skips the last slide altogether.

I am planning to launch my website tomorrow and didn't realize this issue was occurring so this is not good news.

Any help someone can offer? Please PM me for a link to the demo of this on my site.

These are my View settings: