[Pharo-dev] [Spec] whenSelectedItemsChanged: on TreeModel

Hi, I am experiencing problems with #whenSelectedItemsChanged: on a TreeModel. In particular, the block (i.e., argument of #whenSelectedItemsChanged: gets randomly executed a couple of times (3/4) the second time that the selection happens. The first time is fine. It looks like the registration of the “event” or “announcement” is done multiple times. Any hint? Cheers, R