Yeah the “Unknown Ore” is simply a “mine it to find out” kindof thing because data has to be sent over which it only does when it gets updated by an adjacent block, otherwise it would effectively ban anyone with a band internet connection from a Server.
If you actually have “Unknown Ore” in your Inventory, that would be a real Issue, but so far the only way for that to happen is Applied Energistics Meteors, which I cant fix.