I will try to explain - but english is not my mother tongue…
Well I do own a Mecool M8Spro+ box with Coreelec 9.2.2 stable.
I have installed Hyperion.ng as an addon. It is working fine with my ambilight.
My Led stripe has its own microcontroller with WLED and gets its data via udpraw.
As already said : everything is running fine.
Hyperion.ng has as standard its protocol buffer Server on port 19445.
I use android devices with my TV, too. On android is an app called Hyperion Android Grabber
see:
This application will run a background service to capture the content of your screen and send it to a local instance of hyperion to control ambilight-like lights.
Coreelec changed the Version of hyperion.ng some days ago.
In the new Version the Protobuf Server on Port 19445 does does not work anymore.
Its working only locally with Version 9.2.103.
I went back to hyperion.ng 9.2.101 : working fine again with the android app.
The same Problem in the living room :
Hyperion.ng running on a Mecool KI pro
Hyperion Android grabber running on a Shield TV
Version 9.2.101 running fine
Version9.2.103 not working with data grabbed on the shield