Ok. Here's a rpt of the "clear the town" objective not completing. This is again with a vanilla mission:

https://www.dropbox.com/s/lw7oe7omvtuf2bm/arma3_2016-02-25_22-04-44.rpt?dl=0

The mission type is "Civilian Objective Assault." The mission name is "Clear the town." Even after using the commander tablet and marking all active units and ensuring there were absolutely no enemies anywhere, the objective still never completes.

Hopefully this will prove useful. Military Objective Assault and Military Objective Defend both worked wonderfully. On my way through the others.