At first I had the Pistol Holster with a IJ-70 and a FNX-45 + pistol flashlight + supressor and after proning and/or firing my primary gun ( AK and M4 ) the Holster would go "invisible" and not able to be seen by its wearer, yet could still be picked up, put down, and the pistol could be taken out and put back in, all while invisible. Also, the pistol could be seen floating in mid air.

I also had this same issue with the High-Capacity green vest.