Alexa with emulated_hue no longer working on 2023.5

Hi,
I’m sorry if this is already been mentioned. I tried to search but couldn’t find anything. All similar issues seem to be using Nabu Casa cloud.
I had emulated hue set up to expose some of my lights, which were then picked up by Alexa. Everything worked via Alexa voice commands and Alexa app.
Then I updated to HA 2023.5 and Alexa could not longer control the lights.
I deleted the devices from Alexa via the app and rediscovered them, because I could see them being listed in the API call to emulated hue (/api/v2/lights). Discovery worked fine but Alexa is still unable to control the lights.
All I get is “device is not responding. Please check its network connection and power supply”.
I know that the network connection and power supply is fine, because I can still control the lights via the HA app and web ui.