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

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?

try remove the RecyclerView animator?

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

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

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