Sounds like it may have intentionally not been implemented due to taking 5 seconds to register?
(Also, I'm not sure about this particular device, but "released" isn't necessarily useless without "held." The Fast Pico driver, for example, reports "pushed" and "released" and works well for ramping up/down bulbs/dimmers. If you only get "released" after what would be "held," then...yeah, different story.)
