Playback stutters on unpause after being paused for a while with wasapi audio

mpv version:

mpv 1c9c2f5 Copyright © 2000-2023 mpv/MPlayer/mplayer2 projects
built on Dec 10 2023 12:02:48
libplacebo version: v6.338.0-62-g52314e0-dirty
FFmpeg version: N-112938-g12e25af7a
FFmpeg library versions:
libavutil 58.32.100
libavcodec 60.35.100
libavformat 60.18.100
libswscale 7.6.100
libavfilter 9.14.100
libswresample 4.13.100

Windows version:

Edition Windows 11 Home
Version 22H2
Installed on ‎12/‎18/‎2023
OS build 22621.3007
Experience Windows Feature Experience Pack 1000.22681.1000.0

mpv binary:

0.37.0 from Shinchiro, x86_64-v3

GPU model, driver and version:

integrated graphics Radeon 780M on 7840U AMD proc

Reproduction steps

1. Grab a video, say this one: https://download.blender.org/peach/bigbuckbunny_movies/BigBuckBunny_320x180.mp4
2. mpv --no-config BigBuckBunny_320x180.mp4
3. press space bar to pause
4. Wait for 10 seconds (longer pauses make it more likely to run into the bug)
5. press space bar to unpause

Expected behavior

on step 5, playback should be nice and smooth.

Actual behavior

on step 5, I get a frame or two, a stutter/hiccup of maybe 1/4-1/2 second, then normal playback

If instead I run mpv with --ao=openal or --ao=sdl, the problem does not reproduce. It seems to be a wasapi problem.

Log file

log.txt

Sample files

Probably any .mp4 file (or any movie) but I did test with BigBuckBunny as indicated in step 1.

Reproduce the issue with mpv --no-config BigBuckBunny_320x180.mp4, pausing for at least 10 seconds, and read the provided log.txt. Compare WASAPI with the reported OpenAL and SDL runs to narrow the audio-backend behavior. Done means playback resumes without the reported frame drop or 1/4–1/2 second stutter after a long pause.