我检查了产品代码(12.01)中的问题，这似乎是此情况下的特定产品问题.看来，当选择了根元素会自动改变位置参数孩子".我在内部系统中发现了一个缺陷.

I checked the issue within the product code (12.01) and it seems to be a product issue specific to this case. It seems that when the root element is selected it automatically changes the Position argument to 'child'. I have opened a defect in our internal systems.

非常感谢您发现此问题.

Thank you very much for finding this issue.