Possible MA Doppleganger bug

I was testing a new arc I'm working on, which features a fight with a Doppleganger.
I was using a Peacebringer for this, and after I defeated my Doppleganger, it used Restore Essence to revive itself, but it also changed into a Longbow model!

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to TO THE END!
Villains are those who dedicate their lives to causing mayhem. Villians are people from the planet Villia!

This isn't just an issue with the MA, but with the doppleganger tech itself it seems.

I ran into a similar issue, I ran the hero TF with the dopplegangers at the end (Posi part 1?), and used Possess on them (which turns enemies black when it beats their mez protection). When it would end, they'd turn into Longbow Wardens as well! Seems that the 'base' model for them (or just the default fallback model) is the Warden, which is revealed under those conditions.

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