That's definitely a bug in service implementation, and definitely should be fixed there (though I couldn't reproduce it here?)

Does it actually start up the service in that case, and just not send a reply? I think a call should return with an error anyways, if a backing service just crashes mid-request.

Yeah it starts up, but after a normal reboot it has entered failsafe mode and I had to disable it.
It looked like: Boot -> autostart PicCap -> reboot -> Failsafe -> disable failsafe -> reboot -> autostart PicCap -> reboot -> failsafe -> ....

Edited the script, until now two restarts and everything went well. Will take a look the next days

Sure, but this will also leave dangling luna-send execution in the background. I think we should probably rather use timeout or something similar, if we really weren't able to resolve it service-side.

Waiting on some tests here: https://github.com/TBSniller/piccap/releases/tag/0.2.1

Final tests done