Bug PB The Enrapt One

This PB drops :
Running Left Arm Symbiant, Infantry Unit Aban (140)
Breathing Right Hand Symbiant, Artillery Unit Aban (100)

Yet after multiple PB popped i got a few bags of :
Breathing Right Hand Symbiant, Artillery Unit Aban (100)

How is it possible that there is 1% chance to get the second symb? Honestly i got 3 bags of right hand artillery…WTH if this is not a bug what is it?

Was it removed from game? Tell us in advance at least no ?