This is very odd to hear of @Milan1da! Is this digital chime kit on our chime compatibility list? To start, please ensure the Doorbell Pro is wired using standard gauge wiring and not thin or spliced wired. Please also double check that the Pro Power Kit is installed at your chime kit. Once confirmed, let’s remove and reinstall the Ring app on your mobile device to ensure it is up to date and optimally integrated with your mobile device.
If this concern persists, I recommend checking on the chime type selecting in your Ring app. From the Ring app dashboard, open the Menu, select Devices, select your Doorbell Pro, select Device Settings, and then select In home Chime. This will allow you to specify the type of chime being used. Feel free to let us know how this goes!