Bug with editable function in blueprint Structure Variable

Hello
Using the “editable” function of the variable field when writing a Structure BP is not functionning.
For instance, if I use a map variable with the structure, the editing of the variable field is not working properly. Sometimes only one variable stays hidden, sometines none.
Even if I rebuild from scratch the Structure BP without resaving it…

Very unconvenient from layout perspective.
Thanks for you help.
Georges