Not a huge issue but I just updated and the icons inside folders are sort of dark. I only thought that happened when apps inside of folders needed to update/download but all apps are updated/downloaded
I had this with my Facebook app, the app looked fine when I opened the folder. I just turned the phone off, and on again and the icon went back to normal.
Go into the folder, hard press so apps wiggle like they will be moved, tap outside the folder, hit done in upper right. Fixed. (and didn't come back for me)