Watercolour brushes don't seem to be working properly

Hi, I'm having problems getting the watercolour brushes to appear correctly on my canvas on Painter 2023.

The screenshot below is using the Watercolour:Fringe > Hard Fringe brush (left) and the Watercolour: Real > Fringe brush on the right. My understanding is that standard fringe brushes should appear more like the real brush on the right, albeit with some differences. However, as you can see it looks more like a stamp that's being duplicated as I draw. Am I going mad or is this some sort of error? And is there a fix please?