Closing the window result is a white flash, this is recent behavior maybe due to march 2026 windows update

[44vince44]

Describe the bug
When closing the window of mpv.net, there is a quick white rectangle that appears for a fraction of a second, perceived as a white flash. Sometimes it's the whole window area, sometimes a rectangle inside it.
Sometimes there is no flash.

Important note: I didn't notice any white flash before the Windows11 march 2026 update.

To Reproduce
To reproduce, try the last beta version using the CLI option --config=no => same behavior

In case of an audio or video issue, try to reproduce the issue using mpv instead of mpv.net.:
=> with mpv there is no such issue.

You may need to do this a couple of times to notice, because sometimes there is no flash.

Expected behavior
There should not be a white flash.

Screenshots

ScreenVidCapture.mp4

Above is a video capture of the moment when I close the window.

Additional context
Add any other context about the problem here.

1. mpv.net version 7.1.2.0
2. Windows version W11 Enterprise 24h2 26100.8037 (updated on march 10, 2026), dark mode.
3. GPU name Intel UHD Graphics (Intel Integrated Graphics in core i9 cpu, Laptop)
4. Media info: tested on several media types, same behavior.

I sincerely hope your health is improving. Take care of yourself!

[HedioKojima]

Are you using gpu-api=vulkan?

[44vince44]

I did not specify any gpu-api.

However, I just made 3 tests, with gpu-api= vulcan , then opengl, then d3d11, and the result is the same: I get a white flash in the window of mpvnet when I quit.

[HedioKojima]

I found that this situation occurs when using mpv with gpu-api=vulkan, but it works normally with gpu-api=d3d11. I also tried mpv.net, and indeed this situation occurs when gpu-api=d3d11 as well.

[44vince44]

I forgot to say that I'm using dark mode on windows. So I've edited the first post accordingly.

@HedioKojima
Do you remember if it happened before the windows monthly update of 10 march 2026 ?

[HedioKojima]

Yes, there have been similar situations before. I asked Grok AI, and it might be an issue with .NET (WinForms/WPF).