Playing a mission on algorithm and just prior to fighting Geoff I found my character was no longer taking damage.
I had over shield on and was always at max hp and shield, this persisted through the entire mission, I even tested getting crushed by ISIC and received no damage.
I was one of two Oscar Mikes in the mission.
Match ID: 20160417-cc5ef66f-387c-40b5-a3e9-92abe25a1999