Unable To Close MOC

[M1ndo]

Bug and expected behavior
Unable To Close MOCP Client When MOC Server Is Running , it hangs forever and it doesn't close the window once it's detached .

No profile and disabling firejail
When Using --noprofile same issue happens , when calling mocp with full path and detaching using q it closes normally tho the other window is still hanging.

Reproduce
Steps to reproduce the behavior:
Currently There's no way to reproduce this behavior except running mocp with no sandboxing .

Environment
DarkOs Linux "One Hell" (Based on Arch Linux)
Firejail version ```firejail version 0.9.64.4

Compile time support:
- AppArmor support is enabled
- AppImage support is enabled
- chroot support is enabled
- D-BUS proxy support is enabled
- file and directory whitelisting support is enabled
- file transfer support is enabled
- firetunnel support is enabled
- networking support is enabled
- overlayfs support is disabled
- private-home support is enabled
- private-cache and tmpfs as user enabled
- SELinux support is disabled
- user namespace support is enabled
- X11 sandboxing support is enabled```

Additional context
Screenshot of the issue IMG
Screenshot with the noprofile https://imgur.com/a/uuKD6j4

• When The Mocp Window is stuck , if you opened another mocp window and tried to detach t will detach normally like it should however the other instance still stuck .

Checklist

• The profile (and redirect profile if exists) hasn't already been fixed upstream.
• The program has a profile. (If not, request one in https://github.com/netblue30/firejail/issues/1139)
• I have performed a short search for similar issues (to avoid opening a duplicate).
• If it is a AppImage, --profile=PROFILENAME is used to set the right profile.
• Used LC_ALL=en_US.UTF-8 LANG=en_US.UTF-8 PROGRAM to get english error-messages.
• I'm aware of browser-allow-drm yes/browser-disable-u2f no in firejail.config to allow DRM/U2F in browsers.

Debug Output with firejail --debug mocp

https://0x0.st/-KFd.txt

[rusty-snake]

1. Can you reproduce this with the noprofile.profile?
2. What does pstree/firejail --tree/ps -ejH/... show? Are there any processes running in the background?