Jump effect when no further zooming in allowed

Hi! I'm testing the Charts framework v3.0.4 (d953129). Till now all is good and I like it. But there is someting that I don't understant. If I enable scale only on X and set a min. zoom in level of 1.0 for example:

_chartView.dragEnabled = YES;
_chartView.scaleXEnabled = YES;
_chartView.scaleYEnabled = NO;
// [_chartView setScaleEnabled:YES];
_chartView.pinchZoomEnabled = NO;

...

_chartView.data = data;
[_chartView setVisibleXRangeMinimum:1.0];

in ChartsDemo, LineChart1ViewController.m then when reaching the min. zoom in level, a jump is produce on X.

So with a BalloonMarker present on the screen, I zoom in and all is ok. But when it's reaching the min. zoom in level, then something is not right. I think a translation is happening... It's a bug or how can I avoid this behaviour?

Thank you!