Video Cropped Immersive Circle view

[PJdandy]

Since upgrading my screen to Dell U4025QW 5K ultrawide monitor (5120x2160 resolution, 21:9 aspect ratio), I experience unwanted cropping in certain viewing modes (e.g., "Immersive Circle"), even though the camera’s feed displays correctly in other applications.

My camera is still the same Sony ZV-E1 using Cam link 4K.

I have selected maintain original ration option in the settings yet no changes...

Any support will be welcome!

Thanks,

[elliot1]

is possible to upload a snapshot so that we can take a look?  thanks. @PJdandy 
And if change the resolution to 16:9, what will happen?