#3 Ways with emergency=yes appear black

[Kempelen]

Ways that have extra emergency=yes attribute appear black instead of their own color.
Tested with highway=service and some others.

Can be tested on this location:
https://render.osmtippek.hu/index.php?zoom=18&lat=47.48013&lon=19.05552

poi-icons.mapcss:42
z-index:6 seems to be the cause, but needs to be debugged why. It probably brings up a color from a non-layer specific rule. (A default rule applying to the same object but without "::icon" layer)

way|z15-[tourism]::icon, 
way|z15-[amenity]::icon, 
way|z15-[shop]::icon, 
way|z15-[craft]::icon, 
way|z15-[leisure]::icon, 
way|z15-[gambling]::icon,
way|z15-[office]::icon,
way|z15-[healthcare]::icon,
way|z15-[man_made]::icon,
way|z15-[historic]::icon,
way|z15-[railway]::icon,
way|z15-[public_transport]::icon,
way|z15-[emergency]::icon {
    z-index: 6;
    fill-opacity:0;
}