Chimes in the house not working

I have Video Doorbell and three chimes in the house. All has worked perfectly...until recently. All the chimes in the house are silent. I have checked the app and these are all set to sound and work correctly.The doorbell rings outside, but none of the chimes inside sound. Internet is good throughout the house. If I take the battery out of the doorbell and re-inset, the system work again with the chimes working in the house. Thsi proves the system and app are setup correctly.App says firmware is up to date.It is a pain because we keep missing deliveries. The chime failure just rears its ugly head again.Any ideas please? Thank you in advance.