Chime Pro 1st gen and Chime no sound when doorbell pressed

My Chime Pro 1st Gen does not play a sound when the doorbell is pressed.In the app it is set to play a sound and it is not on snooze. The device health is good and nothing else has changed.Now if I power of the Chime Pro and turn it back on it will play when the doorbell is pressed. but leave it a couple of hours and when the doorbell is pressed it does not ring in the house. This is also the same for the standard wireless chime again 1st Gen.I have tried moving things off the chime pro network onto my wifi and still the problem exsists.I do get a notification in the app when the doorbell is pressed but i dont always have my phone on me so this is not a solution.Can anyone Help?