As of framework 19.20 updated on Fenix 6 Pro and other Fenix series, also including Vivoactive4 watches CIQ watchfaces crash immediatelly if you have defined a timer in onExitSleep()
I created a bug ticket, can you vote for it in the bug section if you experience the same problem.
forums.garmin.com/.../bug-watches-crashing-if-a-timer-started-in-onexitsleep