Thank you for your immediate reply.
Indeed, your screen-cast show no trouble and I have tried to better analyse what the trouble is.
When the mouse follows an orthogonal path, there is no problem. For example : Praticiens > Chirurgiens Orthopédistes > Dr Yvan Acquitter > any name below : its OK
But, if I try to hover straight from > Chirurgien Orthopedistes to > Dr Damien Bellan, the menu fades away.
On some websites, you would click on > Chirurgiens Orthopedistes in order to stabilize the next pop-up column and choose any name from it whatever the mouse pathway.
Is that functionning possible with Evolve+? Thank you in advance for your reply.