Bug - Hoverformat for second axis fails if axis is not visible

[emanuelnastasa]

Observed behavior:
Having a chart with 2 Y axes, if you mark the second Y axis as "visible:false" the hoverformat property for that axis is ignored and the values are shown in exponential form.

Expected behavior:
The hoverformat is respected regardless of the visible parameter.

Steps to reproduce:
1.Access the JSFiddle:https://jsfiddle.net/a75dhu5z/
2. Change layout.yaxis2.visible between false and true and observe the value displayed in the hover tool-tip of the top point in the orange trace.

Build found
It's reproducing in all builds from 1.31 to the latest release 1.33.1

[etpinard]

Thanks for the report.