little bug in zooming graphs?

Hello folks,
when I am checking the disk fs graphs and trying to get a detailed view with using the zoom (little loupe on the right side of the graph),
I get the view from an other disk instead of the disk for what I am looking for.
e.g. I am interessted in /nfs/exp, I am using the loupe and get the graph from an other filesystem like /aldv/*


 it is switching the view to

[Hobbit Monitor 4.2.0]

Any ideas?

Regards,
Klaus