I don’t use dmx, but I guess you’ll have to use quotes:
... , resumeafter=true]
vs.
... , resumeafter="true"]
Please consider to use code fences, as otherwise discourse will change some chars
" vs. “ and ”, ' vs. ‘ and ’
.things
chaser kitchen_rgb_chaser [dmxid="68,69,70,71,72,73,74,75,76,80,81,82,83,84,85,86,87,88",
steps="2000:255,0,0,128,128,0,0,255,0,0,128,128,0,0,255,128,0,128:0|2000:128,128,0,0,255,0,0,128,128,0,0,255,128,0,128,255,0,0:0|2000:0,255,0,0,128,128,0,0,255,128,0,128,255,0,0,128,128,0:0|2000:0,128,128,0,0,255,128,0,128,255,0,0,128,128,0,0,255,0:0|2000:0,0,255,128,0,128,255,0,0,128,128,0,0,255,0,0,128,128:0|2000:128,0,128,255,0,0,128,128,0,0,255,0,0,128,128,0,0,255:0]",
resumeafter="true"]