Sorry to hear about these experiences, neighbors. As stated previously in this thread, including a video example will help determine potential causes. Audio feedback can often be related to network or wiring (if hardwired). These instances will also be shared with the appropriate teams.
In the meantime, please try a power cycle by removing the Video Doorbell 2 battery and reinserting it after 10 seconds. Please let us know if this improves anything. Thank you!