@Jonathon I think @mathieu-l asked it you rebooted after installing drbd 9.2.18 from test repository. Your message sounds like you rebooted after installing 9.2.16 but not after applying the 9.2.18 update from test repository.

@Dezerd What does "xe task-list" show as far as active processes?

Thanks for the reports and the detailed analysis. I'll make sure that the XOA team is notified.