Regression of #5854

[Domino987]

Regression of #5854
If all current markers show within range have hoverinfo: "none" with hovermode: "x unified", an error is thrown:
Cannot read properties of undefined (reading 'hoverLabels')

If the marker is hovered, it throws the error.

It seems like the hoverlabels are being accessed, but because no marker with a hoverinfo is currently visible, due to them being outside of the rendered range, they cannot be found.

I would expect the hover event to be called, but no hoverlabel to be shown.

Here is a minimal Sandbox