Ring Holds Piston Down

I had the Ring doorbell set up and working fine, but recently noticed that when the Ring button is pressed, the chime piston is held down for a few seconds, making a buzzing sound, and then after 10 seconds is released, making the doorbell ring. You can see what I mean in this video: https://www.dropbox.com/s/80c1ireh9grtxus/20210312_151737.mp4?dl=0 (just cancel out of the Dropbox signin/signup box when it appears)Any idea what's going on and how to fix?