Looking for PS4 Pre Sequel Kwik Change Thingy Rocket Launcher

I’m on the PS4 Playing TPS and I’m trying to find a Kwik Change Thingy Level 70 Rocket Launcher. I ran Iwajira like 20 times now and he’s not dropping any. Is this a known glitch in ps4 or something cause people on xbox say he drops it very often. My PSN id is Abaddon_81877.

Ive moved your thread to the PS4 section in the Handsome Collection category.
Good luck and happy looting!