This issue is really unacceptable, IMO. My Fenix 7 Sapphire Solare never failed to wake me up for work in the morning, but my new Fenix 8 AMOLED frequently fails to trigger my wake up alarm! I have a weekday alarm for 4:50am which matches my old watch but it will not trigger at least once per week on average.
I love the AMOLED screen and other features compared to my old watch but the bugs are worst I've ever experienced with any Garmin product.