4K movies one screen and some ?? problem

[Super957 24]

It happens to me with some 4K movies, on a PC or stick inserted into the TV, no problem. While seeing it from Emby, a screen appears to me and a piece alongside as in the image I am attaching. What can it depend on?

 

Thank

Hispa

 

Edited April 3, 2023 by Super957

[Luke 42077]

Hi, what problem is in this image?

[Super957 24]

35 minutes ago, Luke said:

Hi, what problem is in this image?

See the image at right is a part of left screen

 

Hispa

[Luke 42077]

On 4/3/2023 at 5:35 PM, Super957 said:

See the image at right is a part of left screen

 

Hispa

Can you please explain it?