First I would say that your Blue Mystique Phal is planted to deep in the substrate. And this results in a to wet environment and a big risk to get water in the crown followed by rot. I think that this is the problem and the new leaf could be attact by fungus or rot, the black dots.
I should remove substrate to free the leaf down to the fist root and see if the leaf grow out normaly. Maybe I would try to find som chemical agent against rot or fungus to treat the plant to prevent an attack.
Your pictures are very small and it is hard to see details.
I would also take a look on those whithe dots on the older leafs on the Pink Phal to see if they are scales or not. It is impossibly to see on your small pictures.