dbtree bean not showing 3rd level label

I have a tree, 3 nodes, the last one does not show its label, though clicking on it returns the correct field content, even if using the one used for the missing label.
see screen capture…

this means that the text dataprovider on
the binding for the 3rd level nodes, cannot be find/does not exist

it does, the popup showing ‘tribunal de commerce’ is the same field sent by the setMethodToCallOnClick when clicking in this not_found label…

please open case in our support system, with a sample that shows this behavior

As I could not send you my whole app, I made an example which … works.
I then moved the db to another server for other reasons, and now it works.
Since the former db is deleted, I can’t really say what was bad though I think it was the relationship which was guilty:
under some conditions I have not been able to determine clearly yet, if tables are linked via UUID fields, and the uuid flag is off (field not generated by servoy), the related elements may not work properly and looping through related records for instance issues a msg like:
the relationship should use 2 PK fields or none, but not one PK and a normal field. Note this issue does not prevent portals from working fine which lead me on the wrong track.
Consider this as over unless I can come across the problem woth more accurate info.