When expanding, the child elements pass through the groups below them

[ALXKAY]

If the TreeView does not fill the full screen, then when you expand, you can see how the children go through the groups below them.

Any ideas how to fix this?

[shineM]

try remove the RecyclerView animator?

[ALXKAY]

I set a DefaultItemAnimator for the TreeView. I think it's better than completely removing the animation.

TreeView treeView;
...
treeView.setItemAnimator(new DefaultItemAnimator());