After a restart ZNC is starting but will not create a DSM shortcut. Only if you stop and start ZNC again from the package center the shortcut will be greated again.
That's not handled by the SPK directly but relies on the SPK logic by Synology. Using the DSMUIDIR keyword in the INFO file.
I think you can report that to Synology directly
I just restarted and could not reproduce this.
Strange, will try some more restarts this week.
Still having this issue?
Sorry for the late comment, the issue is gone with the new version 0.206-2. Afther a reboot the icon is created again.