Mutable Plugin - Texture Interpolate Alpha Bug

Hello, I believe I found a bug with mutable, when using the texture interpolate node the Alpha channel seems to get completely dropped. Since I’m interpolating between two base color maps, and both have an alpha that I’m planning to use in a masked material, it would be awesome to have that map get interpolated too. This is what I’m using as a workaround, but obviously I lose the interpolation this way: