IKEA Tradfri - LED bulb E27 470 lumen globe - abrupt turn on / no transistion


I have three Tradfri globe bulbs setup in HA via ZHA.

I’ve noticed I can’t get them to nicely transition from off to on. Instead, there is something of an abrupt jump when they come on, even if I tick and supply a transition value in the Light: Turn On action.

Video of behaviour: https://user.fm/files/v2-734069850223632fa56cfd1a9723cafb/Lights.mp4

Is this just a problem with the minimum brightness capability of the bulb? Or is there a clever way of making them fade on gently I don’t know about? Cheers.