audio stops playing for 3-5s when using seek backward (#LEFT seek -5) with external audio track (.mka)

mpv Information

mpv v0.38.0-711-g67e087dc Copyright © 2000-2024 mpv/MPlayer/mplayer2 projects
 built on Aug 20 2024 00:11:31
libplacebo version: v7.349.0 (v7.349.0-5-g82bf46a-dirty)
FFmpeg version: N-116752-g507c2a577
FFmpeg library versions:
   libavcodec      61.11.100
   libavdevice     61.2.100
   libavfilter     10.2.102
   libavformat     61.5.101
   libavutil       59.34.100
   libswresample   5.2.100
   libswscale      8.2.100

Other Information

Windows version: Windows 10 22H2 Build 19045.4170)
GPU model, driver and version: intel HD Graphics 4600, driver: 20.19.15.5171
Source of mpv: https://sourceforge.net/projects/mpv-player-windows/files/
Introduced in version: v38.0

Reproduction Steps

watch video (in my case 40-50min video 1080p) with an external .mka audio track and seek backward (one time or multiple times) with default keybind #LEFT seek -5 # seek 5 seconds backward

Expected Behavior

seek works smooth like with an internal (inside the .mkv) audio track

Actual Behavior

when using seek backward. The audio will stop for 3-5 seconds (sometimes even more) and then it will play again

Log File

gpu-debug
output.txt
normal logfile
v.38.0
output.txt
v0.38.0-711-g67e087dc
output.txt

Sample Files

No response

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.

Start by reproducing the 3–5 second audio pause when seeking backward with an external .mka track, using the reported Windows and mpv versions. Compare the attached normal and GPU-debug logs with equivalent playback using an internal audio track. Done means backward seeking resumes audio without the reported delay under the same conditions.