FlxStrips appear full black when debugDraw is enabled

[Geokureli]

Affects html5 but not Mac builds. no other targets tested. I've seen similar issues when testing on mac targets, though

Example:

package states;

import flixel.FlxG;
import flixel.FlxStrip;
import flixel.graphics.tile.FlxDrawTrianglesItem;

class BlackDebugSliceSpriteTestState extends flixel.FlxState
{
    override function create()
    {
        super.create();
        
        FlxG.camera.bgColor = 0xFF808080;
        
        final strip = new FlxStrip(50, 50, "assets/images/haxe.png");
        strip.vertices = DrawData.ofArray([0.0, 0.0, 80, 0.0, 40, 40]);
        strip.indices = DrawData.ofArray([0, 1, 2]);
        strip.uvtData = DrawData.ofArray([0, 0, 0, 1, 1, 1.0]);
        add(strip);
        
        FlxG.debugger.drawDebug = true;
    }
}

Using this image

Here's how it looks when debug draw is false:

true: