I think my problem may be an update to Gboard I'm just guessing and will see how it acts today. I switch back and forth from the regular to gboard and I like the regular Samsung one cause it matches my themes but I swype so much better on Gboard. Last night Gboard stayed up on my screen and wouldn't let me do anything I tried to go back and minimize and make it go away and it didn't do anything but up top I could still swipe over to move my home screens it was weird. I don't remember if turning screen off and on helped this time or if I rebooted. It was late after work last night. So I will monitor it today I am off all day. I'm guessing maybe it had to do with Gboard and i know i just had an update. I'm hoping that's all it was.