Doorbell keeps clicking between normal and night vision

I've had the doorbell (Pro, hardwired) about 2 years and this issue has only started to happen in the past week. I'll hear what sounds like clicking at around 9:30-10pm (bare in mind sunset here is around 6:30pm at the moment), so I open up the Ring app and notice the camera is switching from normal mode to nightvision and back. It happen for about 20 minutes, but I checked the timelapse last night and it was doing it all through the night. Here's a video if it happening:https://www.youtube.com/watch?v=OZXyn0ddOcg The camera has not been moved or repositioned, no extra lights have been added around the capture area, nor has the motion zones been changed. I have noticed that the motion doesn't always capture motion correctly. Sometimes it'll trigger from a cat walking down the path, but for example I walked out the door this morning, and there's no event! Can anyone confirm if its faulty? What's the deal with getting a replacement? I have the 'Protect Basic' annual plan, but noticed the call centre is a US number (I'm in the UK), seems a bit pants