From V10 on, the documentation states:
As of v10, if a task uses a sync and has a START and END action defined, but no ABEND action, then during a restart on abend, it does not execute the START action again. This is because no END action has been executed.
(see http://docs.automic.com/documentation/AE/10.0/english/AE_WEBHELP/help.htm?product=awa#uc910a.htm)
Inconsistency described behavior above and actual behavior.
The START action is executed again.