Welcome to Astral Realms, Hera We have discussed this a few times before, but I do not think we really came up with anything definitive. I have the same types of dreams, on occassion. Nothing extraordinary or prophetic, just dreams about simple, everyday situations which come to pass soon after. Like dreaming of driving hurriedly to the airport, almost late, but the plane was late, we boarded at such and such a time, and took off at such and such a time. All of which came to pass precisely as I dreamed it. Nothing astonishing or out of the ordinary. Why dream of such a thing? I do not know.
No doubt it is as you said, time being illusory. I do think it indicates a certain connection with our unconscious mind, and perhaps it is a subconscious verification or message suggesting that we are on "the right track" ... that things, like time, are as we perceive them or think them to be.
I really have no good answer. But I do believe that this is something which you can develop further, a door which leads to a connection with your higher awareness.
I love Jung too! I would love to hear any dreams you may wish to share!