I can't select any meshes on my black mask

I am having issues with using black masks in Substance 3D Painter. On my desired layer, I am able to create a new folder and a new black mask. However, when I click on the model and try selecting a mesh (with polygon fill and mesh fill), it does not select it. I also cannot go back to change it later. It is stuck as being a completely black mask.

I am working on multiple layers each with their own segments in my model. The first layer worked completely normal. It still works when I switch back to that layer and try adjusting the mask selection. It is only an issue with my other masks.

I am switching to the correct layer. I am selecting with the polygon fill -> mesh fill tool. I'm using the same process that works on the first layer. However, it doesn't seem to work.