Thanks! Actually it does look like a bit like that, it’s even worse at lower brightness! I would guess 0.8s at 100% up to 1.5s delay at 5% brightness. Either way, I’m not too happy with them.
If this is default behavior then I would expect a lot more complaints, so I am still hoping there is a fix/workaound. Most issues I could find are related with more extreme delays like 5s or minutes, which obviously are caused by something completely different (GW/Mesh). In my case the bulb is now the only paired device (after a Zigbee reset), and in the same room as the Homey. May have to consider downgrading to 4.2 to see if that works better.
Would be nice to know from other owners of these E27 bulbs to share their experience: does anyone get a fast resonse? Or maybe I should exchange all 7 of them for Lidl bulbs.
[Update] I just bought a couple of Osram Smart+ dimmable bulbs (Ledvance?) from amazon.nl (€7,99) and they seem to respond faster. I’d say about 0.3s regardless of brightness level, just acceptable. I’m still surprised that wifi based lights seem to respond faster.