Merry Christmas to you all! 
I moved a waypoint.
Now, in the same system, I would like to add another WP. But the game let me only move the WP I moved before.
Selecting any other WP button is useless: no WP is created.
Even deleting the WP I moved is useless: no WP can still be added.
Only saving, closing and restarting the game resolves this behaviour.
Unfortunately, this means even if I share here the DB you cannot reproduce the issue.
"Move Waypoint" command is getting fixed in 2.6.0.
