So I’ve got a bug open and I’m unsure if it’s just me having the issue, or if it is really is a bug in ESPHome.
https://github.com/esphome/issues/issues/1558
So as the title says, any thing newer than 1.15.2 ESPHome the lighting transition from HA doesn’t work correctly. So i say turn on transition 10 seconds. The light turns on full brightness after 2 seconds. The MQTT shows the correct transition time, it’s just ESPHome doesn’t seem to do it.
please have a look at the github link and post here and there if you have the same issue, or even provide a fix if you know of one.