Tabbed Page Appearing / Dissapearing

I'm looking for some guidance on how to handle the Appearing / Disappearing in Xamarin Forms Android inside a Tabbed page.

I have a app similar to Snapchat, a 3 tabbed app with the 'Main' tab having a camera live stream.

Now opening the camera happens in "OnAppearing" and closing in "OnDisappearing".

Android

First load

MainPage:
    OnAppearing
    OnDisappearing
    OnAppearing
SecondPage:
    OnAppearing
ThirdPage:
    OnAppearing

MainPage to SecondPage:

MainPage:
    OnDisappearing
SeconPage: nothing
ThirdPage: nothing

SecondPage to ThirdPage:

MainPage: nothing
SeconPage:
    OnDisappearing
ThirdPage: nothing

ThirdPage to SecondPage:

MainPage: nothing
SeconPage:
    OnAppearing
ThirdPage:
    OnDisappearing

SecondPage to MainPage:

MainPage:
    OnAppearing
SeconPage:
    OnDisappearing
ThirdPage: nothing

iOS

First load

MainPage:
    OnAppearing
SecondPage: nothing
ThirdPage: nothing

MainPage to SecondPage:

MainPage:
    OnDisappearing
SeconPage:
    OnAppearing
ThirdPage: nothing

SecondPage to ThirdPage:

MainPage: nothing
SeconPage:
    OnDisappearing
ThirdPage:
    OnAppearing

ThirdPage to SecondPage:

MainPage: nothing
SeconPage:
    OnAppearing
ThirdPage:
    OnDisappearing

SecondPage to MainPage:

MainPage:
    OnAppearing
SeconPage:
    OnDisappearing
ThirdPage: nothing

Due to the inconsistenties I added a CurrentPageChanged eventhandler in the tabbed page.

protected override void OnCurrentPageChanged()
    {
    //Check which page is shown and fire a method isShown / isHidden
}

Now it is also possible that a Modal is opened on top of the camera:

So there the camera should close as well, when the modal is closed, the camera re-opened.

Now doing these fires the OnAppearing / OnDisappearing correctly on both OS.
Except when the app get's minified (home button), then again there are inconsistenties.

So we are on the 'MainPage' and we open the modal:

Android

Without minifying app

MainPage:
    OnDisappearing

#close modal
MainPage:
    OnAppearing

Minifying app in between

MainPage:
    OnDisappearing

#minify
#reopen
MainPage:
    OnAppearing

#close modal
MainPage: nothing

iOS

Without minifying app

MainPage:
    OnDisappearing

#close modal
MainPage:
    OnAppearing

Minifying app in between

MainPage:
    OnDisappearing

#minify
#reopen
MainPage: nothing

#close modal
MainPage:
    OnAppearing

As you can see, opening and closing the camera using the CurrentPageChanged, Appearing and Disappearing is challenging due to the inconsistenties.
Has anyone tackled this problem before ?

I've been thinking to add an event to the Modal, and fire that event when it will close itself, and close the camera prior to opening that modal so I should not need onAppearing / onDisappearing anymore. But in one case I do need it, when the user initially denied permission to the camera, we show a dialog to open the settings for them and change it, when they come back, OnAppearing should recheck permissions and open the camera.