This is a function of the transformer/MR16 LED interaction. Since the transformer is electrically situated between the MR16 LED lamp and the dimmer, the LED lamp does not react directly to the dimmer turning off as is the case with 230VAC LED lamps. The MR16 LED reacts to the voltage diminishing on the output of the transformer and due to possible energy being stored in the transformer, the LED could flick when turning off or even exhibit a slower turn off than it’s 230VAC LED or halogen counterpart.
It was found that this is not a function of the dimmer brand or dimming method. If the transformer/MR16 LED lamps exhibits this characteristic, it will usually occur with any type of dimmer, whether leading edge, trailing edge, rotary or bell-press.