I used to have issues with UWP on earlier versions of windows 10. Eventually the last version I did a reset of the OS from the settings area and it has been perfect since. I also like using the w32 UWP wrapped apps from the store like spotify, itunes and f.lux. Just easier to deal with them and updates are so simple.
I have only played a few purchased UWP games. The majority have been free to play and haven't come across issues yet.
I do recommend a reset of the OS, especially if you upgraded from windows 7 or an earlier one. Or ran anything before April update. That's windows for you.
