Hi  @Leek-Sausage,

Welcome to the community!

This type of "shutter" effect is common when the refresh rate (high-speed flickering) of the room's LED light bulb(s) is operating at a frequency that clashes with the frame rate of the camera. Since it only occurs when the room's LED lights are on, this is the likely culprit.

A couple of things worth trying:

• Adjust the frame rate on the camera to a higher or lower setting to see if the banding/shutter effect persists.
   
• For a more permanent workaround, and if you would prefer to leave the camera's frame rate as-is, you can try replacing the room's LEDs (if they are easily replaceable) with LED bulbs that incorporate "anti-flicker", or "flicker-free" technology.