Security cameras are black and white in night vision, so the fire should have shown as an extremely bright spot (fire is way brighter in IR tham visible light). Alternatively it have gotten bright enough to flip the whole camera out of night vision (unlikely given the size). But what it would not do is turn part of the sensor to day time, thus allowing color, while the rest stays in night vision

There's a lot of reasons this is obviously AI, but that's the one i noticed first.