Ring video doorbell - image pixelated colour pink/green/blue hues

Hi, I have had a Ring video boorbell 8VR1S5-VAU0 mounted outside my property facing the street for quite some time now.It has been working without issue then suddently one day, perhaps 3-6 months ago now, when someone pressed the doorbell and I opened up the video all the colours in the image appeared pixelated with pink/blue/green gues throughout impacting the ability to clearly see the image, and has persisted ever since.I have just unmounted the doorbell and performed a hard reset, set it up from scratch again and yet the issue persists. Could this be a firmware issue as it just suddenly started occurring? Ring firmware version in device health says "Up to date". Using Ring app version 5.26.1 on iOS 13.4.1. There is no visible physical damage to the doorbell from where it was mounted.Attached screenshot for reference... any ideas?!