On pressing mobile back button, app is refreshed and reloaded instead of going back

Hello Folks,

I am facing one weird issue with my ionic android application. When I press mobile phone hardware back button it is reloading/refreshing whole application instead of going back.
I have tried to use event.stopPropogation() and also this.nav.pop() but nothing works.
So kindly help me out.

Thanks & Regards,
Kunal Kakkad