Myelectric: Axis label missing

I see some pictures from myelectric view with a x-axis label (power values) like this:

At my emonpi and also at for me it looks like:

I tried with latest firefox and safari.
How can I display the power values?

EDIT: I think I got the answer: If the power is more than 1000 W a label for 1000 W is shown.
So it seems the resolution of the label is in steps of 1000. Is it possible to change that? For smaller values there seems to be no label all the time.