Why does playing gaming apps block calls/texts

[AC Question]

Recently I've noticed that when I play a few gaming apps, incoming calls go directly to voice mail & text messages get delayed.

Is there a setting that does this, can this be disabled?

 

[B. Diddy]

Welcome to Android Central! That may depend on the phone. Which one do you have?

 

[Achan92]

Samsung s6. The provider is Fido

 

[B. Diddy]

Is Do Not Disturb turned on? What is the Do not disturb feature, and how do I use it on my Samsung Galaxy S6?