Cannot Rotate Y-labels in TH2F

I am trying to rotate the alpha-numeric label on the y-axis of a TH2F using TAxis::LabelsOption(“v”). However as you can see in the attached example, it has no effect on the y-axis. It does work for the x-axis. Any idea what I am doing wrong? I am using v6-05-02 tag of ROOT in git.
labelTest.pdf (12.7 KB)
labelTest.C (312 Bytes)

Yes it seems to work for X axis only …


No, but this can help: