Bug Report: Gray bars on the top and bottom of the screen during movie streaming on laptop

Description:

I am experiencing gray bars on the top and bottom of the screen when streaming movies in full screen on my laptop. These gray bars are in addition to the black letterbox bars that are part of the movie. So from top to bottom, I see: gray bar, black bar, movie, black bar, gray bar.

 

Expected Result:

I expect the color of the bars/background to be black, not gray.

 

Specifications:

Website: https://www.xfinity.com/stream/

Laptop: Microsoft Surface Book 2

OS: Windows 10 Pro 64 bit

Resolution: 3240x2160

Aspect ratio: 3:2

Browser: Chrome

 

Steps to Reproduce:

Try watching the following movies on a laptop/monitor with a 3:2 aspect ratio in full screen:

• Us
• Midnight Special
• The Good Liar

For Us and Midnight Special, the gray bars appear on the top and bottom of the screen. For The Good Liar, the gray bars appear on the sides of the screen.

 

My theory is that the default color of the background is gray and the movie is drawn on top of this gray background. The most common aspect ratio is 16:9 and it's possible that other aspect ratios, like 3:2, haven't been tested.

 

Please let me know if you need any additional details. Thanks!