You’re misunderstanding how the feature works. If you want to create a transition from ord.->sul pont., then you either have to create that in one go in the Shift+P popover, i.e. by typing “ord->sul pont” into the popover, or you create the playing techniques as two separate ones, then select them after you have created them and choose Edit > Playing Techniques > Group Playing Techniques. This will also automatically cause the “ord.” playing technique to show the expected transition arrow, and this will persist when you save, close and reopen the project.
“One Go”, otherwise “Group Playing Techniques after separate ones”!
It now works!
Thank you for the details. I should have had watched the video more carefully. Sorry.