The Dreadnought Vanguard Boss (NPC Driven bug)

I found a bug, probably known, but not listed under known problems.

What happened

The boss is bugged and won't attack just retreating endlessly.

How it happened

Battle includes an NPC fighting the boss alongside you, when the NPC and I (a Titan, were attacking the boss it started to retreat, not casting abilities.

It was awkwardly caught between myself and the NPC and for whatever reason, this is the only thing that can't shove you across the map.

This was made worse by the boss favoring retreat after retreating.

Idea's of a fix

1. Add push

(Least liked option, as I believe there is excessive push in the game as is).

2. Add an option for the boss to force an attack pattern if retreat is cast too many times in a row.

(Decent solve but still not the core of this issue).

3. Remove/modify NPC from the encounter.

(Best solution as it fix's the problem at it's core, but option 2 could impact other bosses positively when encounter retreat commands repeatedly).