Random doorbell chime

So recently our ring doorbell stopped working. It wouldn’t ever connect. I had a baby and just let it go because it still rang in the house when people came but now we have the opposite issue. It is connected the same as it always has been, the app tells me the batter is about to die but it’s wired in. The ring itself will not chime in the house but every single night the mechanical door bell box in our house wing ring on its own starting at like 9pm and continue the rest of the night until around 8 the next morning. We have disconnected both to make sure nothing got loose, we even put our old doorbell back up and it worked just fine. The communication between our doorbell and the indoor box just are not working properly and we can not figure it out.