@slandeira
Perhaps the internal battery (yes, it has one) in your Google Nest Hello Doorbell is failing. When it fails, the doorbell goes offline for a minute whenever the doorbell button is pressed, the indoor chime does not ring, and visitor announcements and notifications don't occur.
Since the internal battery is supposed to provide power to the doorbell's camera in the instant when the doorbell's button is pressed and power is diverted to your indoor doorbell chime, the workaround is to turn off the "Indoor chime" option for your doorbell and rely instead on "Visitor announcements". In that case, the doorbell works fine except for ringing the indoor chime. That's what we've done now in succession on all 3 of our Google Nest Hello Doorbells.
This has happened to MANY other customers. Google Nest says they "cannot" replace such doorbells if they are past the 1-year warranty. See this very long thread with over 1,000 replies:
https://www.googlenestcommunity.com/t5/Cameras-and-Doorbells/Nest-Hello-Doorbell-cuts-out-when-butto...
Some customers have tried prying open their doorbells and replaced the battery with a 3rd-party battery:
https://www.ifixit.com/Guide/Nest+Hello+Battery+Replacement/131729
