Devices in groups not updating dim level from flow

[adelfia]

I have several Trådfri groups, as defined in the Ikea app.

When using a flow to change dim level for a group, for example from 20% to 90%, the following happens:

• The dim level displayed in the group device in Homey is updated. I can open the group device in the Homey app and see that the dim slider is almost at max.
• The individual devices within the group are not updated, opening an individual device and looking at the dim level, it's still at 20%

But if I drag the slider in the group device, the underlying individual devices are updated.

The behaviour is not consistent. Updating group dim level from a flow sometimes works, most of the time not. Dragging the group dim level slider manually always works.

Homey Pro (Early 2019) v8.1.3 Ikea Trådfri Gateway v0.1.9 Ikea Gateway v1.20.65 Ikea Trådfri bulb FW 2.3.093

[adelfia]

Update: It works if I enable the "force individual dim" setting for the group. However, this adds a considerable delay to dimming the group of 8 lamps. Also the lights don't dim in sync, making it a less visually pleasing experience. I'd really like to be able to dim them all as a group - the same way it always works when dragging the slider manually. Any ideas? :)