Back button functionality not working

1

I have got some weird issue.
in my app back button isn’t working properly. When I click back, it close my app.

but when I click any video in my app and then close then back functionality works properly. After that wherever I navigate in my app, back functionality works in flow.

Thanks in advance.

2

if the back button closes your app then there is no backview in your nav history. maybe your states and linking is buggy

3

I am new to ionic.

can you guide me on how I can set backview in nav history.