Black Rectangle in bottom center of screen

I get a large black rectangle in the bottom center of the screen when I change the settings on Apple TV to 4K HDR. I have already replaced the HDMI cables and am now using 8K capable cables with no resolution. Please advise.

Hello, @Elclavo75 Thank you for notifying us about the issue. We will look into this immediately. Would you be so kind to try the following steps to see if it solves the issue?

Please try performing a factory reset by going to Settings> General> Factory Reset.
Once the projector is reset, please make sure that the projector has the latest firmware.
This can be done by going to Settings>General>Update version. Please update the projector if it is not up to date.

If the issue is still not fixed, kindly take a video of it and send it to Thank you!