[BUG] SoftInputMode breaks when navigating. If first CreateWindow starts without "NavigationPage"

[Kevin-5831]

Description
I'm in the process of migrating an app from Xamarin to Maui. In the Xamarin app we did our first navigation without "NavigationPage/MainPage", we just did "MainPage". After migrating to MAUI, i noticed that when an Entry field got the focus the SoftInputMode would work as AdjustResize and not as AdjustPan. Also changing SoftInputMode didn't change anything.
After much investigation I found out that when we do our first navigation as "NavigationPage/MainPage" the issue wouldn't occur and AdjustPan was used.
I can work around this issue now by using the NavigationPage and hiding it with NavigationPage.HasNavigationBar="False"
So I've a work around, but still would like to inform you about the issue.
Repo to reproduce:
https://github.com/pvw-4bs/SoftInputNotChangingAfterNavigation

Prism.Maui 9.0.537

Steps to Reproduce
Start the application
Click SoftInputMode button
You will see that colored borders change according to PanAdjust or PanResize behaviour
Click Navigate
Click on "Enter your name" so that keyboard pops up
Click SoftInputMode button
You'll observe that colored borders don't change anymore
If you change .CreateWindow("MainPage")); to .CreateWindow("NavigationPage/MainPage")); in MauiProgram.cs, the SoftInputMode keeps working after navigation

Platform with bug
.NET MAUI

Affected platforms
Android, I was not able test on other platforms

Did you find any workaround?
Add "NavigationPage/YourPage" to CreateWindow and hide navigationbar with NavigationPage.HasNavigationBar="False"

Relevant log output
No response

[nightfairy5831]

I don't know if it's relevant but I'm also getting the below error at a regular basis in my migrated application when navigating back. But the navigation still works, it navigates back. Can't reproduce this issue in the provided repo.

Code:
await NavigationService.GoBackAsync(navigationParams).ConfigureAwait(true);
Error:
Java.Lang.IllegalArgumentException: 'No destination with ID 26 is on the NavController's back stack. The current destination is Destination(0x18) class=crc6452ffdc5b34af3a0f.NavigationViewFragment'

[nightfairy5831]

This sure sounds like a Maui bug and not a Prism bug.