I've had the camera for about 2.5 years, have been using it 24/7 to monitor the kid. For the past 4 months there has been an incredibly irritating high pitch noise coming from the device when it was in night mode. Ever since that i switched to day mode and the noise went away. Just recently i noticed that the noise came back and no matter if i switch between day/night mode it doesn't go away. I've tried restarting it, resetting it etc, nothing works. It has the latest firmware etc. I think there's something wrong with the hardware but would appreciate an experts opinion. I've uploaded a video of it (increase the volue to hear it, my camera couldn't pick it up well).

https://youtube.com/shorts/VlAwczJd-cM