How to fix distorted prototype?

While on presentation mode for a prototype, either on browser on on the windows app, for some reason, even though I set the view to 100% actual size which means it should not distort anything, there is a slight distortion on the preview.

You can check here on the screenshots:


It happens on any prototype I create. Anyone has any idea how can I fix this? Is it a bug?

And here is what it looks like on editor mode.

It just happens on presentation mode.