Companion weapon affinity bug?

[(PSN)xtharbadx]

As per the wiki, under companion affinity:

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  • A nearby Tenno, but not the Companion's owner, kills an enemy. Affinity gained by the Companion does not detract from that gained by its owner.
    • Affinity is split between the Companion and its weapon 50/50%.

   

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I just run a mission with a full squad using my new Moa equipped with a new companion weapon from Fortuna, and while the Moa ranked from 0 to 30, the weapon received only a minuscule amount of affinity.

Is this a bug or did they change how shared affinity works with companions?

[actuallyVile]

The weapon equipped on a MOA seems to only get affinity from the MOA using it. Equipping it on a Sentinel however will level it up pretty quickly, especially in squads. Sounds like a bug to me. Not sure though.