I also had power issues so I’ve made a small case mod and powered the Pi independently via the mini USB connector, which cured the problems.
I share David’s issues with no schedules running automatically at all. As per my other post (https://opensprinkler.com/forums/topic/programs-only-seem-to-run-when-website-or-app-is-open/), the programs only run if the either the app or Web page is open.