Inconsistent window controls behavior after fullscreen toggle with maximize

[Samillion]

mpv Information

mpv v0.39.0-113-g228f3860 Copyright © 2000-2024 mpv/MPlayer/mplayer2 projects
 built on Oct 13 2024 00:08:22
libplacebo version: v7.349.0 (v7.349.0-15-g756220c-dirty)
FFmpeg version: N-117481-g02306cbfe
FFmpeg library versions:
   libavcodec      61.22.100
   libavdevice     61.4.100
   libavfilter     10.6.100
   libavformat     61.9.100
   libavutil       59.42.100
   libswresample   5.4.100
   libswscale      8.5.100

Other Information

- Windows version: Windowx 10 x64
- GPU model, driver and version: Nvidia GTX 660, v475.14
- Source of mpv: https://sourceforge.net/projects/mpv-player-windows/files/
- Introduced in version: Found on v0.39, not sure since when

Reproduction Steps

To reproduce, do the following:

• mpv video.mp4 --no-border --no-config
• Maximize => Fullscreen => Unmaximize
• Maximize => Unmiximize (now requires two clicks)

Expected Behavior

Unmaximize in one click

Actual Behavior

Unmaximize needs two clicks.

• First click maximizes a couple of pixels
• Second click actually unmaxmizes.

Log File

Log output.txt

This was originally reported on my OSC fork repo, which contains more videos and logs:
Samillion/ModernZ#18

Sample Files

Preview of the behavior in action:

2024.10.14.-.wc_pixels.mp4

I carefully read all instruction and confirm that I did the following:

• I tested with the latest mpv version to validate that the issue is not already fixed.
• I provided all required information including system and mpv version.
• I produced the log file with the exact same set of files, parameters, and conditions used in "Reproduction Steps", with the addition of --log-file=output.txt.
• I produced the log file while the behaviors described in "Actual Behavior" were actively observed.
• I attached the full, untruncated log file.
• I attached the backtrace in the case of a crash.

[Samillion]

I forgot to note that "Maximize" behavior after that stays the same, requiring two clicks to maximize.