Blank screen from the notification tab when the phone is locked - IONIC - ionic-framework

When we double-tap a notification on the lock screen, it automatically prompts us to enter your mobile password, then upon unlocking the device, it launches the app with blank screen & then redirects to the data whichever notification was tapped.
I don't understand where the problem is happening? Is there anyone help me out with this problem?
In case of Unlock Screen: It is working perfectly.
In case of Lock Screen: It should have shown a splash screen instead of blank screen.

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unable to add PWA app to home screen, error Home Screen Layout Locked

I have a PWA app which works fine on all phones including my phone which is a MI phone. I have a download app button which fires the installation banner.
But on one of other Samsung phone, install button doesn't work. It doesn't fire banner at all. And if I try to go manually by selecting "Add To Home Screen" from Menu, it shows instalation pop up but after clicking add displays error.
Can't Add "App Name" To Home Screen. Home screen layout locked.
Please help.

Navigating to an external link from an ionic 4 app makes the hardware back button close the app where there is navigation history?

Navigate to an external link or display an interstitial Ad (AdMob) and then return to the app by clicking on the hardware back button. At this stage where there are pages in the history (navigation stack), clicking on the hardware back button will cause the app to close! Knowing that I had tried to register to the back button by:
this.platform.backbutton.subscribe(()=>{
this.navCtrl.pop();
// Also tried: this.navCtrl.back();
});
But it is still exiting the app!
Any idea about how to solve this?!
Actually, I had realized that navigating to an external link from the app and returning to it will not cause hardware back button issues, but the problem was that I am displaying the AdMob banner at top of the screen, and when I place it at the bottom (default position) the hardware back button is stable and works as expected even when navigating from the app to an external link and then returning back! So, I kept the banner at bottom where I noticed that positioning banner at bottom was more elegant (at least to my app).
It seems that this is one of the issues in the AdMob plugin, where I had seen other issues about the ionic AdMob plugin without solutions!

PWA add to home screen does not work as expected

I've started with PWA, I want to add home screen icon to my app, but it's added to apps menu instead of home screen
It's usually added to BOTH app and home screen.
But many times it will place the icon on the second home screen for me.
Even if there is a spot open on the first.

How to do a clean app restart (iOS 6.1)?

I realized an app for iOS. It all goes well, works like a charm... until the device is restarted! When I manually close the app (for example, on my iPad I slide four fingers upwards, visualize the menu showing the app "alive", hold the icon of the app and press the red badge, terminating the app) and I try to open it again this is what happens to me:
First the app remains stuck on the last page visited before closing the app (I cannot tap buttons on the tab bar or do anything else)
Then, the only thing I can do is tap the Home button and try to open the app again
At this point all I get is a perfectly black screen
The restart seems to be not a real restart, or not to be clean. This is totally meaningless to me. Am I missing something?
EDIT :
Remove your application by press Hold down Application iCon From simulator/device
And then re-install app. and check it worked or not ???
If your view display with black screen then give it backGround Color redColor or as u wish.
Its iOS app natural behavior only.
When you press Home button on device, While running any iOS app it goes in background but the The app is still in background and its save application's state.
So if you Tap agin app's icon you will get the last screen where did you leave it.
Now, if you want to Restart the app from initial you need to clear it.
Go this way.
Just double press device's Home button you can see running apps on bottom like this
For delete particular app, you simply press and hold, you can see red (-) icon on app
just click on that and you are on way.
Now press Home button and Go to Start app!!
The problem is that Xcode, when it runs an app, attach to it a debbuger which prevents it to close normally and causes problems in the reopening. Thank you very much to this guy who pointed out the problem: https://stackoverflow.com/a/15176137/1272105