Talk to the addon author.
I would if i could - can't find any contact info and so on 
script.service.alarmclock
And i am pretty sure the next advice will be to go to ask in kodi forums, where i will get an answer : go ask in libreelec forums, cuz we don't support distros that repackage kodi.
Hello,
I am using the XBMC Alarm clock addon and it worked flawlessly up until 008 ALPHA. After that, anytime that an alarm which plays an mp3 playlist from http ( m3u extension ) causes the KODI to freeze and the only solution is to reboot ( too lazy to ssh and check if the os below is responsive ).
Is there anything i can do that can help figure this out ? Collecting logs , debugging or w/e ? This addon is really important for me ( waking up problems ;P ).
Regards,
