[Bug] Barchart shows Y-axis below zero while all values are positive

[yurkinh]

We have two sets of data for the current month and for the previous. Both are positive(sales data).
Rendering data with Barchart, actually, all charts that inherit from AxisBasedChart have the same issue, they draw additional Y-axis for negative values.

Reproduces on ios, Android, UWP.
Version: latest 1.0.0-preview1

Expected behavior
No additional Y-axis for negative values if they are not present

Screenshots