[WinUI] Image with FontImageSource is not displayed properly when using a custom font in an unpackaged app

[marchev-prgs]

Description

I have an Image with a FontImageSource, and the Glyph is not displayed properly when a custom font is used:

<Image x:Name="i3" WidthRequest="100" HeightRequest="100" Background="#33EE22AA">
<Image.Source>
<FontImageSource Glyph="&#xe85b;" FontFamily="my_custom_font" />

Please see the repro project.
Note that this happens only in an unpackaged winui app:
None

Here is an image of what is shown:

And here is an image of what is expected:

Steps to Reproduce

1. Get the repo from the link
2. Go to folder Maui\FontImageSourceNotDisplayedInUnpackagedWinUIApp
3. Run the sample application in WinUI

Expected Behavior
The Image should display the glyph from the custom font, it should look like a little house.

Actual Behavior
The Image does not display the glyph properly, just some rectangle is drawn.

Link to public reproduction project repository

https://github.com/telerik/ms-samples/tree/main/Maui/FontImageSourceNotDisplayedInUnpackagedWinUIApp

Version with bug

8.0.3

Is this a regression from previous behavior?

Not sure, did not test other versions

Last version that worked well

Unknown/Other

Affected platforms

Windows

Affected platform versions

No response

Did you find any workaround?

I did not find a workaround.

Relevant log output

No response

[marchev-prgs]

This issue is most likely the one Matthew mentions here.

[BrunoVersa]

I have the same trouble

[rmarinho]

Duplicate of #15802