I have followed all the steps listed on: https://support.apple.com/en-us/HT209456
Works fine if I'm only connected to either ethernet OR wifi, if I have both connections active (even tho they are the same network), I can't answer calls phone with the error: "Call Failed"
And I can't just disable WiFi and lose AirDrop/etc neither disconnect the ethernet cable and lose speed/stability.
Any options?
Edit: Found this 5 years old question, but it doesn't have a solution.