Issue with Texture Map Baking: Black lines and White Spots when Texture Map Baking

Hi, guys

I am creating texture maps for baking details from my Multires sculpt.

In the one Bake, I am trying to capture details from the 6subdev onto a 0subdev using an Image texture node and I am getting weird black lines/bands on the texture bake on Solid View Mode.

In another, I am trying to get the finer pore detail in a bake using the pointiness output of a Geometry node and the Render View Mode result has white spots.

I can figure out the reasons for either issue. Can anyone advise me how to fix this, please?