Data series missing in bar chart for 100% zoom

There seems to be a rendering issue with bar charts (both horizontal and vertical) at 100% browser zoom. At least one series is not visible when it renders. However, on increasing zoom, the missing series shows up. The missing series also shows up if any on of the other series is deselected from the legend.
This problem is observed of Chrome(39.0.2171.95 m) and Firefox(28.0 and 38.0.6). It is working fine for IE11.
c3.js version is 4.11
Snapshot attached below for reference. Green and Violet series are missing even though their values should are high enough for the bars to be visible.