Hmm occasionally I have faced the same issue with the alarm. But always only the first time the alarm goes off. And only sometimes. It's like the phone sort of freezes and I can't swipe up to snooze or turn it off. Nothing works. Then I jush unplug the charger and it snoozes by itself without even pressing anything. Not sure if the power button does the same. I'm not really human the first minutes I'm awake so remembering details can be tricky!

For me it has not been as big of an issue as for you so it hasn't really bothered me.