WV Mountaineer
WKR
I’ve done it a bunch too.Sounds like your torso length is adjusted just a hair too long. Packing meat last year I finally just stopped and shortened my torso length about 1/2''. waist belt stayed in place and pack rode like a dream after that. I find I really need to pay attention to what my pack is doing to get it adjusted perfect. I subconciously hunch my shoulders and lean forward and wonder why my belt eventually slides down for months training before I try adjusting things. After I adjust and it works /fits amazing I wonder why it took so long.