Leaves on Gun Skin Disappear When Changing Parts

When using the Briar Shot weapon skin for the SG 553R, the front leaves disappear when changing the grip or adding a laser or flashlight. 

This skin is part of the battlepass and is a paid cosmetic. The leaves should remain on the skin, no matter what parts are added or removed. That is what the skin was advertised (displayed) as, that is what people should get.

I should not have to use the base parts just to keep the leaves on my weapon.