Syncing WLED strip with other RGB lights in Home Assistant

I have 3 Ikea RGB bulbs in by bedroom, and just added a WLED strip under the bed. I would like to be able to sync the colours of the lights to match.

I set up a light group in Home Assistant, and added the 3 Ikea bulbs and the 1 WLED strip. When I make changes to the light group, all 3 of the Ikea bulbs react, however the WLED strip is unresponsive.

The WLED strip does react properly if I make changes to it directly in HA, just not if I do it as part of a group.

What am I missing?