Rotated video is greyscale, has streaks

[firako]

Describe the bug
Video appears to become greyscale with bands of discoloration in the middle when using video-rotate. This bug does not occur with regular mpv.

To Reproduce
Steps to reproduce the behavior:

1. Create shortcut with input editor with command "add video-rotate 90"
2. Create a second shortcut with command "add video-rotate -90"
3. Open a video with mpv.net, and use the newly binded key(s) to rotate video to 90' or 270'
4. Observe discoloration

Expected behavior
The rotated video should appear to have the same colours as the source video

Screenshots