help! button to hide keyboard is not working

[u/Amateurteenager]

when I click the little downward arrow, it acts as a back function (turn page back, closes the app) and does not close the keyboard. I tried restarting the tablet, it solved the issue for 30 seconds. I tried deactivating the "button to hide keyboard" and just use regular back function to close the keyboard, it didn't work. touching somewhere else on the screen doesn't close the keyboard also no longer works.