gaps between held item textures, stitching

I don't know how many versions this issue effects, but i know for sure its definitely 1.8.9 and 1.16.1. So I've had this issue for a while now and i don't know how to fix it. when i hold items of any texture pack there is a crack where the specific item is meant to lead into another auto-generated texture. This happens on all resource packs, including default and idk what to do. looking online at forums i haven't found any real solution. anti aliasing and astronomic filtering is off, mipmap levels set to 0 changes nothing my setting for "adjust image settings with preview" is "let the 3d application decide", but it still occurs-pls help