Color night vision for wired stick up cam

I have two wired stick up cams and neither one has color night vision. Every once in a while when one of them takes a still shot it will switch into color and then right back to B&W. There isn't color night vision on the device settings. What's going on? Understanding Color Night Vision - Which Ring devices have the color night vision feature? You can find the color night vision feature on the following devices: - Video Doorbell Pro - Video Doorbell Elite - Floodlight Cam - Spotlight Cam Wired/Mount - Stick Up Cam Wired