hi @Johhny,
Ok, The 21 seconds is not surprising and not a problem.
I think the problem is around the stoptask
Could you try only this code and turn on manually
local extinction = GEA.add (id["KOK_LEDLIST"], 30, "", {{"turnOff", id["KOK_LEDLIST"]}})
GEA.add (id["KOK_LEDLIST"], -1, "", {{"StopTask", extinction}})
Could you give us the JSON of RGB please, because i don't undersatnd what happens ;-) ?
http://IPHC2/api/devices/26