Phage shotgun causes excessive controller vibration

[(XBOX)Lou the Lou]

The Phage infested shotgun causes a good deal of controller vibration when fired.  That's kind of annoying, but fine.  What's not fine, and I hope is a bug, is the fact that the vibration continues for a good 5-6 seconds after the gun is no longer being fired.  This happens every time the trigger is pulled.  Whether the entire clip is expended or only a single shot is fired, the controller vibrates for 5-6 seconds.  It is extremely annoying, to the point that I am not going to use the Phage until this is fixed - which is unfortunate, as I need to level that weapon, which means it probably won't get done for quite a while.