Red light on floodlight cam

Hello, I let the dog out last night and noticed the floodlight didn't come on as usual. When I looked at the camera there were red lights on the front of it. I checked on my app and the camera was still working, I could see myself moving (just in the dark!) I switched it off and on again and then it was fine, but I'm would like to know what the issue is? Has anyone else experienced this?