ok, so for now all I can do is let it continue until it finishes?
Keep an eye on the current Delta value of the order. If it is higher than 2 % then you lose money because of frequently rejected bridges (caused by the Difficulty issue). In this case you better delete the order, and don't create new orders before mmpool finds a fix. Deleting an order automatically gets you a refund for the unused BTC amount of that order.