Can't find a way to disable hovertext automatic rotation

I have a horizontal bar chart using hover text that is automatically being rotated about 45 degrees, which I don’t want. I’ve been combing through the API full reference and existing issues (open and closed), but have not found any way to change this:

One detail in the data: there are 2 traces being charted, one in blue and one in grey. Initially all the data was in a single trace and I didn’t have this problem. But both traces have identical options set for the hovertext:

            hoverinfo: 'y+text',
            hovertext: [],
            hoverlabel: {
                bordercolor: 'rgb(100, 100, 100)',
                bgcolor: 'rgb(240, 240, 240)',
                namelength: 0
            }

Am I just missing something or is it not possible to avoid this rotation? There seems to be plenty of room for the hovertext, and even if I reduce the text content to a very short string on a single line it still wants to do the rotation now that I split it into 2 traces.

[etpinard]

You’re right, we don’t expose a way to set the hover label rotation at the moment.

I guess we could add something like:

hoverlabel: {
  angle: 90 // or [10, 90, 45] one item per-pt
}

but that might not cover all the current label rotation logic.

[adrianoesch]

+1 for the angle parameter at the hoverlabels.