Datashader rendering after hv.Overlay update

[okz]

This issue does have few similarities (broken overlay, fixed after user interaction) with the minimum example I just raised:

Missing datashade on overlay, till redraw?

Had problems displaying datashaded ‘flat’ scatter plots, after overlaying with other data, in one go. In the below minimum example, if the next cell displays dscurve all cells show the correct data. But by itself, dscurve * line , dscurve is ignored in the figure, till the user interacts with the figure controls, or forces another ‘visual’ notebook interaction on dscurve, i.e: displaying it alone in another cell. Maybe the overlay operation is changing the “interpolation” range of ‘dscurve…