[ORLD 10.08.01.33] Thematic elevation does not accept negative max elevation

Hi.

I am trying to set the maximum elevation in the thematic display style to negative 20 as shown in the attached picture.

When I press enter the value reverts back to default and shows the error message "Value must be greater than -444.95010." This is highlighted in the bottom left in the picture.

Is there a fix for this error or could this maybe be added as a defect?