It looks like it changed some time in the last month. A sharing link I created on 5 March ended in "b84c1332a6d90f2ea99a5f027ea922a3faa95bce6f88a7d938cbe4d2f76e230f", but one I created on 2 April ended in "7b22746f6b656e223a226f474a52724753737635556b624f62587a5646552b2b6c69372f6a586c6a597233333474574678486735303d222c22746f6b656e5f76657273696f6e223a225632227d".
The test in the suggestion probably needs to be updated to allow for the new longer parameter.