Yes! I am having this issue on my iPhone 7. Check out the discussion here :
https://forums.macrumors.com/threads/ios-background-refresh.2037072/#post-24397036
What I did is, I resetted all the settings. And when I opened those apps, I was asked to allow notifications for those apps. That fixed for a while. But after few days, it was back again, and I was missing notifications.
Apparently, this is a software bug and hopefully will be fixed in 10.3.