Lifeline healbot door bug

During a gunfight i flee inside a building to heal myself...

I close the door and i stick behind it to prevent anyone from getting in...

I pop my heal bot and it goes outside the building through the door.......

I rush outside in a desperate act... While enemy is on his way to get inside...

I empty a clip hoping to peel some health while charging outside... And healbot  stopped all my bullets like a wall.... So collision worked to stop my bullets but failed to stop healbot through the door.....

NICE..... Thanks alot