Question/Bug Report on OneNote Ruler

I am a Student from Germany and have recently stumbled upon a very annoying bug in OneNote:

The scale on the ruler is bricked! Here you can see what I mean: 

Ruler test with 5mm squared paper

The paper I am using is squared 5mm. The problem persists when using other sizes though.

The funny thing about this is that apparently the scaling of the ruler was given some thought, since it does change the size of its scale when you zoom in or out for example.

What is don´t realize is what the reference for it is? Its certainly not a millimeter scale.

The option to change the scale on the ruler or changing it automatically depending on the selected unit of measurement in the settings would be very helpful and appreciated! (I have tried selecting different units in the settings but this does not seem to affect the scale of the ruler...)

I think a lot of students would benefit a lot from this and from my personal experience of talking to other students at my uni, I can confirm, that this a big reason for people to switch to something like Xournal++ or GoodNotes. Especially in technical classes where you often need to draw something accurately...

What do you think about this and would this be an issue that could be resolved in a future update?