Cosmic Player processes remain running after closing, causing high CPU usage

[nalladev]

After playing several ~1 hour long videos one after another (each in a new window, previous windows were closed), my system’s CPU usage eventually reached 100%.

I checked the system monitor and found 3–4 cosmic-player processes still running. Even after closing the player window, the processes continued running in the background. I had to manually stop them to make the system usable again.

This behavior is not fully consistent: sometimes it happens after one fewer or one more video, but most of the time when the CPU reaches 100% and I check the system monitor, I see around 4 cosmic-player processes still running.

Steps to reproduce (approximate):

1. Open Cosmic Player and play a ~1 hour long video.
2. Close the player window.
3. Repeat with a few more videos.
4. Check system monitor for running processes and CPU usage.

Expected behavior:
Closing the player window should fully terminate the associated cosmic-player process.

Actual behavior:
Multiple cosmic-player processes remain running in the background and cause very high CPU usage.

[fabrice-mougin]

I got this issue with VLC playing a 52min vidéo. I played a single video file and I got 4 cosmis-player 100% CPU taking 4 out of 8 CPUs.

[aka-bisht]

"I can confirm this behavior on my end as well. The issue persists during the initial rendering process, regardless of whether a video is active."

[Tro-B0T]

I can confirm this behavior / related behavior is still present, although I'd encountered it when it tried to generate thumbnails for an extentionless cache / octet-stream file.
cosmic-player --thumbnail
cosmic-player 1.0.8 (git commit 5c1887f)