Alexa State of devices wrong

Hey guys,

I am using Alexa with the custom Lambda skill with my HA. Now I switched most of devices over from Hue Emulation etc to directly intergatíng them over MQTT.

Now my issue is, while voice command etc do work, the reported state in the Alexa app is just wrong.
It will show Off when On and vice versa. Sometimes it will update the state, most of the time it will not.
ProActive Events are enabled, I relinked the skill and deleted and readded the devices.

If I add the same devices again with Hue emulation the state is shown correctly.