I have played with this forever and finally found out where it goes wrong, just not why. I have a collection which has a collection and so on. It can be endless many levels. The collection has only two properties (which is not relevant). Anyway say my collection looks like this

A->Child A ->GrandChildA->GreatGrandChildA->GreatGreatGrandChildA->GreatGreatGreatGrandChildA

B->ChildB

everything is good. Grid is perfect. BUT if i add my items to the collection upside down, meaning the shorter B tree first, the grid will not paint the last two children on the A tree, the plus sign is there and it expands, but no row UNTIL i click once or twice into the last visible child. I will attach the code. when expanding the second main node, you will see that it does not go all the way down.

I really hope you can help me with this because I will need this functionality.

Best Regards

Rion