Seems like the script doesn't start at boot. Could you try starting it manually with devel-su systemctl start bt-sleep-monitor.timer or devel-su /usr/bin/bt-sleep-monitor.sh? UPDATE: Seems like i forgot to enable the script service. Code: devel-su enable bt-sleep-monitor.timer devel-su start bt-sleep-monitor.timer should solve the problem. I will correct this in the next build.
devel-su enable bt-sleep-monitor.timer devel-su start bt-sleep-monitor.timer
devel-su systemctl enable bt-sleep-monitor.timer devel-su systemctl start bt-sleep-monitor.timer