Tab menu opens during a touch screen game

[AC Question]

I have a Tab A 8". During game play on the touch screen, sometimes all the tabs will open. This happens on 2 different games. My finger is not very close to the lower right, but the tab button is activated.
Model SM-T350. Version 6.1

 

[B. Diddy]

Welcome to Android Central! Maybe the heel of your palm is touching it.