I have the same issues. The temporary fix of resetting the setInterval works. I tried 1250 and that seemed to work on desktop browsers but not mobile browsers. I than tried 2000 and that worked for both mobile browsers and desktop browsers.
It does cause the checkout fields to load more slowly though on fast networks. Hopefully this issue will be addressed in the next plugin update or resolved on this forum thread, as this is not ideal and will only serve as temporary solution.
