Preventing "first frame default value flash" of BindableElement

When I design a bindable UXML, it has some default values. But since each element has binding path, they would all be replaced by the bound object.

When I use it in my custom inspector, I load UXML, CloneTree(this), then finally .Bind(mySerializedObject). But the first frame I can see briefly the design-time value before it is controlled in the next frame.

What can I do after binding to force the tree to change immediately rather than waiting for the next frame? I tried MarkDirtyRepaint, but it is the same, the method says it will repaint the next frame which would occur anyways due to having new binding value. I want the tree to change this frame after setting .Bind.

Currently I manually change the tree using the binded value's fields but it is not generic, different UXML needs different solution just to fix its first frame.