In our job, ClearCase plugin is set to Filter destroy sub-branch events.
However, it is not actually filtering the event and starting a build due to it.
This is taken from the job changes list (I removed some naming information, nothing which related to the bug:
#002395 (Oct 25, 2015 3:22:58 PM)
1. ClearCase Administrator detail Destroyed branch "/main/xxx/yyy/zzz".