Expanding first child in TreeView results in enabled hover state in each expanded row

When expanding first child which hover state is enabled in TreeView, it results in enabled hover state in each expanded rows.
qtbug80446.png shows that when expanding the row of "C:", the row of "User"'s hover state is also enabled (yellow means hover enabled)

Sample code is attached (qtbug80466.zip)

This only happens with the first child.