My Galaxy s8 will not let me answer calls during a game. .

[Android Central Question]

a green bar pops up showing the phone call. But when I click on it nothing happens. And I can't answer the call.This just started happening recently. I do not have game launcher turned on

 

[B. Diddy]

Welcome to Android Central! What does the green bar look like? Is there an icon, or a button, or something to swipe?