Can you link that please, the Priest in the EF High Mass stated definitively and for a good few minutes , that Pope Pius XII had never , nor has the Church ever, stated whether Mary died or not.
The Priest went on to say We cannot assume that being free from sin, Mary was free from death, nor that Mary did not die, as we have the example of Christ, being free from sin, dying on the Cross. Which is an excellent point.
The words being ‘when the course of her earthly life was over’ are as far into this as the Church gets at this point in time.
I am going to state, that this is the Latin Rite Roman Catholic Church we are discussing in my posts.