Bug: Multicast task not killing itself after finishing task.

[szykex]

Describe the bug
Bug occurs when multicast complete its task. FOG isn't clearing old multicast task leading to not be able to start new multicast for the group.

To Reproduce
Steps to reproduce the behavior:

1. Start multicast and wait for it to finish
2. Check tasks -> active multicast task, and it should be clean, but it's not.
3. Checking multicast.log reveals that service loop is stuck because of that task.

Expected behavior
Active multicast tasks should be cleaned after multicast ended.

Screenshots

The top one is old task that hasn't been cleared properly after finishing.

Software (please complete the following information):

• FOG version 1.5.10.1826
• FOS kernel 6.12.35
• OS: Debian 13.4

Additional context
Sometimes starting task, and then cleaning it should resolve an issues. Sometimes FOGMulticast service need to be restarted to work properly.

[szykex]

I tested more version of FOG, and the glitch is introduced in version 1826. 1815 works fine.

version 1698. version 1733. version 1754. version 1798. version 1815. version 1826. (task should be killed!)