Why does my Lumia 830 automatically go back to the previous program every few seconds?

[Windows Central Question]

My Lumia 830 automatically goes back to previous program every few seconds

Lumia 830 using windows 8.1 (upgrade not available in India yet) keeps on going back to previous programs automatically few seconds. It is just like automatically hitting the Return Key every few seconds. If 5 programs are in the background and if I am working on one program, it will automatically go back to previous programs and the previous programs every 8 seconds or so. Look forward to your support.