Doorbell Pro 2 way audio issue

First post here si Hi everyone first :) Pretty happy with my doorbell pro until today where the postman rang. Picked up on my phone as I was at work and I never managed to speak with him and he seemed angry. Back home, I gave it a try and figured it out the following : I rang and my wife answered on my phone from inside the house. Started speaking and 2 sec after started hearing myself loud and clear repeating like if there was an echo. My wife tried also speaking from the phone to the doorbell and I could barely hear her. Call community support but I doubt my call got properly understood as the lady was repaeating that I was reporting a poor audio quality. I don't have any audio quality just a 2 way audio that doesn't seem to work anymore and I have an expensive polly parrot doorbell that repeats all I say. Anyone been through the same issue ? Anyway to fix it ? Just to try I unplugged the power of the doorbell for 5 minutes and tried again but it doesn't help. Now I understand why the postman was mad ...