notifications – It’s saying my apps are lagging when not opened or in tabs?

I’ll be in a completely unrelated app and a notification will pop up in a small box at the bottom of the screen saying Google Play is running slow. and give the options like usual like close app, wait, and send feedback, but I never had the app open. Both Google Play and E-mail have been doing this, I haven’t opened them recently, in months in fact and it just started doing this. I haven’t dropped my tablet, or damaged it in any way as a matter of fact. Any ideas what to do? I can’t disable or uninstall either apps