Water inside motion detection bulb on floodlight cam

I installed a floodlight camera on my garage last week. We’ve had one rainfall event (and it wasn’t even an inch of rain) since and there’s already a good amount of water accumulated inside the bulb. Is this expected? Is it defective? I’ve seen other answer which suggest bringing the camera inside for a couple days to dry out. Yeah, I don’t think I’m going to rewire this camera every time it rains.