Light/Glare on window

I installed my security cam two days ago, indoors, pointing at a window. I had fairly clear visibility the first night. The second night though, a light seems to be projecting onto the window that wasn’t there the night before. After playing with the settings and unplugging/replugging the device, the light/glare disappeared. It’s back this evening and everything I tried yesterday isn’t working. Nothing has changed... position is the same, same lighting outside.