Wiered problem with ionic2 Navigation

Hi Guys,

I am facing a very weird problem with navigation within the one place of my application and not able to figure out where the problem is. To simplify I have recorded a video here.

Also Supported code here:

Problem : When i navigate through pages so views are stacked through push but by going back it seems at one place nav.pop performs twise and 2 times views are calling.

If you want to see the code for specific pages, I have attached all supported Files. Please go through it and help me to solve as I am about to publish the app but because o this bug not able to.

As trying to solve this from last few days, your help would be appreciated.