MaterialTree does not visually select MaterialTreeItem on setSelectedItem

[SandraK82]

I call setSelectedItem on a Tree, filled with items by code:
tree.clear() MaterialTreeItem first = null; for(MyObject obj : getMyObjects()) { MaterialTreeItem item = getItem(obj); if(first==null) first = item; tree.add(item); } tree.setSelectedItem(first);
This does not visually shows selection of first item.
Tested with gmd 2.2 and 2.3.0
tree.setSelectedItem(first) was called from a event handler, tested also with a deferred and scheduled command

[SandraK82]

if I use first.select(); after loop it works like a charm..