Since the line is placed in the corner of the document one would expect the coordinates to be:
M 2, 2 H 13
and not
M 2, 58.5 H 13
but obviously this is not the case. Below is what it ends up looking like in the browser.
I've tried creating a new document, but the anomaly persists.
I've never experienced any issues like this before, so I would be incredibly grateful if somebody knows and or can explain what's causing this unusual behaviour.