So, im playing Prussia and have a firm grip on the Lubeck tradenode where I have almost all of the tradepower except from Denmark with their Själland trade center. I have over 100% trade efficiency and have 50 light ships protecting it from Denmark. But some times, for a couple of months, or a couple of years, for no reason Great Britain steers away half the trade to the English Channel without neither a Merchant precent nor any lightships protecting trade. For no obvious reason they get 1700 current trade power and cut my trade income in half. WHY is that?