Soft/Very Soft Erasers aren't working in Harmony advanced 16

So I’m trying to erase with the Soft and the Very Soft eraser, but it won’t do anything. Normal eraser works, but these erasers don’t. I’ve checked the render view, but it doesn’t show up. I think Harmony doesn’t know that they do anything since I can’t undo the attempt to erase something, but I’m not sure.

Here’s an example:

Any answers are appreciated!