Chart labels on y axis are missing. Not all of them are displayed. Some of them are skipped. Sometimes even Expand Chart will not solve the problem.
A chart with all labels displayed:
A chart with labels missing/skipped:
This is by design.
Chart does not have enough space to render all labels when there are too many labels, so every second label is skipped.
There are two workarounds.
First way is to change the chart display by modifying the chart series or group by, or removing a couple of records to reduce the number of labels.
Second way is to zoom out the browser.
We are discussing to support customization of the series font size. It will allow to make labels smaller but this feature is currently not supported.