Why my mobile running apps are getting closed by themselves while im getting or making a voice call?

[Android Central Question]

My mobile apps are getting closed by themselves so fast like as I am pressing back button while I m getting or making call..but when I'm using it's doing fine..I did factory reset many times also..hope anyone help me to get my out of this.

 

[B. Diddy]

Welcome to Android Central! Which phone? Are you saying that the apps are completely closing out of RAM, or that the screen just goes to the dialer?