Scrollbar Limits Problem

I am using a vertical scrollbar for which I set the limits with:
scrollBar.setRangeLimits(0.0f, 1.5f, juce::dontSendNotification);
But, in the callback function used by listeners “scrollBarMoved”, the parameter “newRangeStart” goes only until 0.5 and not 1.5 as specified (at least under GNU/Linux).
My current workaround is to set the limits to 2.5 so that the listeners received 1.5 when the scrollbar is completely down. But this is not elegant since the scrollbar is much bigger than needed.
Is there something I missed or is this a bug?

because you need to take into account newRangeStart but getLength of the range if the scrollbar itself

I think I got it.