Same bulbs, start raising and start lowering dimmer via rule machine is broken due to a communication issue with the new Advanced Zigbee CT Driver. Basically, you can turn on the bulb via rule machine but the device driver has NO idea what the level is, hence it cannot start raising or lowering it. No refresh either on the driver. Ill turn off a bulb, and hubitat will tell me its on at 20% with some weird temperature. Hubitat usually releases 1 or 10 hotfixes after a release so crossing my fingers its a known issue. Going back to the Generic Zigbee CT (Dev) driver works as expected with correct bulb information shown.
Edit: If I manually set the bulb to 100% in hubitat, THEN start lowering it works sometimes, but then when the bulb turns off it still registers as on in hubitat. Old driver works as expected.