Accuracy Thematic Display: Aquaplaning (Slope %)

Hey,

I'm trying to use the Thematic Display: Aquaplaning (with Slope % enabled) to show a visual analysis of cross slopes. The settings are like in the image below. I basically want all slopes >1% to show blue and slopes <1% red

However, in the 3D view it shows slopes larger than 1% as blue which should be red. Image:

Whenever I change the settings from 0% - 1% = blue, to 0% - 0,5% = blue. The 3D view shows the slopes to a maximum of 1% (see image).

Is this a bug, or is there a setting to make the display style a bit more accurate? [Corridor interval is set to 0,25m]

Kind regards,