White bar at top of screen

When viewing a comic in full screen, a thin white bar pops in and out at the top of the screen when I scroll. I scroll using the touchpad on my laptop and it is distracting to see a white bar flicker in and out constantly. Images attached show what this looks like, with the white bar at the top. I wonder if something is one pixel off so the dimensions don't line up appropriately or something?

Right click "view image" to see the bar, it isn't really visible in the preview.

We have a 1 pixel border in the full screen to work around full screen problems in Windows, but that should not affect MacOSX. Luis, any ideas?

What macos version are you using? I can't see that problem.

Do you mind trying the latest dev build? bintray.com/beta/#/luisangelsm/YACReader...ds/2101222?tab=files

Attached my system information; display is 13.3 inch 2560x1600

I just tried the dev build; problem still occurs there as well.

Thanks for the info.

Is there any hope of a fix for this?
I came to the forum just for this issue.
It only became an issue when I updated my computer to Big Sur, it has been present in all updates since, from 11.0 - 11.2.3.

I didn’t find what’s the problem yet...sorry.