A tabbed pane lost the tabChangeListener property, after the component was saved / restored.
I have checked the code on version 1.1.6 and that property was saved and restored. But by some reason this property does not appear on its tld. It seems that use t:tabChangeListener tag is the preferred way to add tabChangeListeners. Anyway, the solution is save and restore this property using proper code on saveState and restoreState methods.