IPC only fires percent-pos 100 event on input

mpv Information

mpv v0.40.0-dirty Copyright © 2000-2025 mpv/MPlayer/mplayer2 projects
 built on Jul 14 2025 14:00:27
libplacebo version: v7.351.0
FFmpeg version: n7.1.1
FFmpeg library versions:
   libavcodec      61.19.101
   libavdevice     61.3.100
   libavfilter     10.4.100
   libavformat     61.7.100
   libavutil       59.39.100
   libswresample   5.3.100
   libswscale      8.3.100

Other Information

- Linux version: Arch Linux
- Kernel Version: 6.12.32-1-lts
- GPU Model: Advanced Micro Devices, Inc. [AMD/ATI] Lucienne [1002:164c] (rev c2)
- Mesa/GPU Driver Version: Mesa 25.1.6-arch1.1
- Window Manager and Version: i3wm 4.24
- Source of mpv: Arch repository
- Latest known working version:
- Issue started after the following happened:

Reproduction Steps

• Launched mpv with --input-ipc-server.
• Sent observe_property for percent-pos and pause.
• Sent loadfile.
• Waited for the playback to finish.

Config used:

idle=yes
force-window=yes
keep-open=yes
input-default-bindings=no

Expected Behavior

Expected to receive {"event":"property-change","id":1,"name":"percent-pos","data":"100.000000"} immediately before or after receiving one for pause

Actual Behavior

Only last percent-pos before completion gets sent, while "100%" one isn't getting sent.

At least not until there's any keyboard/mouse input sent to mpv, such as moving mouse over the window or pressing any key (even without a binding).

If no input is provided (as is my case, with playback being controlled programmatically) - 100% event is never getting sent. Log below illustrates me waiting a full minute after playback finished, before i moved the mouse to trigger the evetn being sent

2025-07-28T09:23:19.442231Z DEBUG mpv_ctl_server::mpv: Received message: {"event":"property-change","id":1,"name":"percent-pos","data":"99.775561"}
2025-07-28T09:23:19.475551Z DEBUG mpv_ctl_server::mpv: Received message: {"event":"property-change","id":1,"name":"percent-pos","data":"99.851114"}
2025-07-28T09:23:19.543107Z DEBUG mpv_ctl_server::mpv: Received message: {"event":"property-change","id":1,"name":"pause","data":"yes"}
2025-07-28T09:24:30.916297Z DEBUG mpv_ctl_server::mpv: Received message: {"event":"property-change","id":1,"name":"percent-pos","data":"100.000000"}

Log File

mpv-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 issue with --input-ipc-server, observe_property for percent-pos and pause, and loadfile using the configuration shown. Trace how percent-pos and pause notifications are queued when playback finishes, then verify that the 100.000000 percent-pos event is delivered without keyboard or mouse input.