Internal restart of service with same PID resets nice value and never gets updated again

[PVermeer]

I'm testing out bazzite with System76 scheduler and sunshine game streaming. Sunshine is added to to the recording assignment that get's set with recording nice=-9 io=(best-effort)0. This works well with sunshine manual start / restart and via a systemd unit start / restart. gnome-system-monitor Reports very high.

However, sunshine has an internal restart function:
https://github.com/LizardByte/Sunshine/blob/69a3edd9b01c76aa44fd5c2a29de1c3b3722cb41/src/platform/linux/misc.cpp#L233-L261

and:
https://github.com/LizardByte/Sunshine/blob/69a3edd9b01c76aa44fd5c2a29de1c3b3722cb41/src/entry_handler.cpp#L148-L167

Using this restart results in a restart of sunshine with the same PID and a reset of the nice value (low normal, high when stream start). System76 scheduler never sets this back to very high as monitored in gnome-system-monitor.

Using bazzite Gnome Desktop edition.

[KyleGospo]

@PVermeer Unrelated to fixing this, I would instead ignore sunshine and then set the nice value in the systemd service.