[BUG] [UWP] Crash after removing SKGLView from page

[joshminor]

Description

When more than one SKGLView is added to a page, removing one will cause a crash.
This was originally discovered while integrating Mapsui (Mapsui/Mapsui#935), but I believe the issue is within SkiaSharp.
I've tested this on Android and iOS without issue, it appears to only be within the UWP project.

STR

• Add an SKGLView to page.
• Add another SKGLView to page.
• Remove second SKGLView
• Do something to make the first element refresh (resize window, etc.)
• Crash!

Basic Information

• IDE: VS2019
• SkiaSharp.Views 1.68.3
• SkiaSharp.Views.Forms 1.68.3
• Xamarin.Forms 4.6.0.800
• UWP: 1803

Screenshots

Reproduction Link
SKGLViewCrash.zip

[joshminor]

Just going to mention that I tried the latest 2.80.1 and this is still a problem

[BurkusCat]

I'm observing this when I have a map on a page, open a popup with a map, and close the popup. If I remove the first map (the one on the page) there is no error.

[radev8]

I have found this also happens across pages. Open a second page with SKGLView and then navigate back to the first page, then get the original SKGLView to redraw and crash.

Is there a way to trigger the release of the GlesContext after a painting or after triggering a navigate to a new window? The only trigger at the moment is when the form is Garbage collected, but this occurs only after the new page is visible.

[MartinZikmund]

I think this could be the same problem as #1490 (or at least the underlying cause could be the same)