I can't align the decal

[jeff_strater]

yes, unfortunately, Fusion does not allow decals to be placed where there is no material.  Instead, create a surface body that fills the hole, and is co-planar with the surface, and use that to place the Decal, then hide this construction surface

[Anonymous]

I tried removing the hole, positioning the decal, and cutting the hole again, but the decal still jumps

[jeff_strater]

that is likely the same problem.  The only way around it that I know of is via adding the extra geometry to position the decal.