It's an attention issue. We have these phones with constant dopamine hits. We were getting it a little bit on the web before the rise of smartphones, but it's just out of control now. We have 100 apps constantly vying for our attention and giving us endless things to scroll through.
The only thing that fixes it is to put the phone down. Do something else. Play video games. Read books. Go outside. Anything to stay away from the phone (but not TV). These phones are as bad as drugs.
I've been pushing to read a lot more books this year and it helps a lot.