Thank you guys for making these known issue threads! It's greatly appreciated.
As others have mentioned before, backpacks and their straps will float above certain vests. The full list of vests affected are: Commissar Coat, Architect Vest, Armored Dual Harness Vest, Armored Vest, BLACKHAWK S.T.R.I.K.E. Shoulder Pads, BLACKHAWK S.T.R.I.K.E. Vest, and Tactical Riot Vest.
Another visual bug I would like to report is that the front/chest area of the Wolf Armor and Silverback Vest are flattened. It's noticeable when compared to other similar vests like the Walker Vest, Pioneer Vest, and Golem Cape. This results in the Silverback Vest's mags floating over the vest.
Edit: these*