Nice app, but problem with sidereal time. – Sky Time Review

I use this in a lab course on radio astronomy I teach to quickly see what the local sidereal time is. This is the problem: When the seconds roll over from 60 to 0, the minutes do not increment by 1 until after 20 seconds have passed by. This is on an iPhone 11 pro.
Review by Jim the astrophysicist on Sky Time.