Welcome to the club …
Notice this happening to my new Android phone for a year now.
But on my old Android tablet the notification are on time.
It’s a Wyze on going issues that they know about…and never resolved yet far as I know…
I have the same thing going on with my newer Android device but does not happen on my older one. WYZE has been looking into it, I (personal opinion) feel it is possibly an Android issue int the newer versions of Android with a ‘doze’ function that is built into Android and does not work properly. I have the issue with many different notifications including GMail. If you search the various threads here about this issue you will see more about it.