Slur color change not showing in the score

If we change the color of a slur line with the inspector, the color of that slur doesn't get updated in the score. But other slur properties (position, line type) does get updated.

Doing this with all other score elements (stem, note, barline, etc), the color gets updated.

Strangely, if we right click on that slur to open the debugger, the color in the debugger is always black.

In end, it seems like there is somewhere a pointer problem, since the debugger and the inspector doesn't show the same information.