Consider the following in an .org file:
* Meetings ** TODO Meeting Thing :meeting: DEADLINE: <2016-04-15 Fri 11:00 +1w -5d> :PROPERTIES: :LOGGING: nil :END:
I typically use
C-c C-t a few times to mark such entries to
DONE, after which Org will reschedule.
However, in this case, Org is rescheduling the entry with an empty date, as follows:
Emacs (snapshot) version is 22.214.171.124. Org version is 8.3.3.