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=OZXyn0ddOcgThe 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