To reproduce:
1) Unzip the attached NB project (TableViewTestV3.zip)
2) Open with NB and setup FX JARs in project properties
3) Run (see TableViewTest3.png)
    -> the three columns have their getTableView() prop correctly setup (see standard output)
4) Click 'Remove Sub from Right' button
    -> 'Left' column's tableView prop is non null : OK
    -> 'Sub' column's tableView prop is null : OK
    -> 'Right' column's tableView prop is null : BUG (or transient effect ?)
5) Click 'Dump'
    -> 'Right' column's tableView prop is still null : BUG