Hover label order for overlapping points is backwards when using WebGL

In a scatter plot with overlapping points, when the hovermode is set to closest, the usual behavior is to show only the information of the trace that is the most in the foreground, that is the latest one to be added, equivalently the one with largest trace number.

example: https://plotly.com/~frseguin/3/

I have noticed that when using WebGL, the information shown is instead of the trace most in the background, equivalently the trace with the smallest number. I do not know if this behavior is intended or not, but seeing as it is different from the regular scatter plot, I thought it might be a bug.

example: https://plotly.com/~frseguin/5/

My use case is the following. I have a line plot on which I want to highlight certain points with markers, but not all of them. I am adding a markers trace for those points on top of the lines trace so that it is visible. I also want the hover info to display the info from markers. At the moment, in WebGL, I can't seem to be able to do both (Trace on top and display hover info).

Thank you very much for your help.

Commencez par reproduire les deux exemples liés et comparez la sélection au survol pour les points qui se chevauchent dans un scatter classique et un scatter WebGL avec hovermode défini sur closest. Suivez le comportement du survol WebGL et vérifiez que le trace au premier plan/le plus récent est sélectionné ; c’est terminé lorsque WebGL correspond au scatter classique tout en préservant la visibilité des marqueurs.