zooming to selection fails

[lars20070]

We are working with highly asymmetric datasets (100 px x 40,000 px). Here an example. Zooming to an arbitrary selection fails.

Image --> Zoom --> To Selection

The action zooms out totally, instead of to the selected region (yellow box in screenshot). Could you please explain how to zoom asymmetrically i.e. with different factors in x and y direction? Thanks.