Commons deletion notification bot stopped on Arabic Wikipedia since 2 months, please see User:Community Tech bot edits on arwiki here (last edit on 09:55, 5 October 2020).
The bot deployed on arwiki on T257108 by @MusikAnimal
Sorry for the late response. At quick glance I'm not sure why it decided to stop working. The bot is editing fine on other wikis, including sr.wikipedia.org, which we deployed to sometime after deploying to ar.wikipedia. Investigation is pending.