Has anyone ever in the history of Buddhism claimed that the phenomenal aspect of the storehouse consciousness is also permanent?
I'm not asking if it's impermanent, but if it is also permanent. Usually the absolute aspect of the storehouse consciousness is said to be permanent
The revelation of the true meaning of the principle of Mahayana can be achieved by unfolding the doctrine that the principle of One Mind has two aspects. One is the aspect of Mind in terms of the Absolute (tathata; Suchness), and the other is the aspect of Mind in terms of phenomena (samsara; birth and death). Each of these two aspects embraces all states of existence. Why? Because these two aspects are mutually inclusive... Since it has been made clear that the essence of all things is empty, i.e., devoid of illusions, the true Mind is eternal, permanent, immutable, pure, and self-sufficient; therefore, it is called "nonempty"
I hope so, and the storehouse consciousness of ordinary people also -- because I cannot see a reasonable way to believe it is just impermanent.