I've noticed that when hitting a ship, it freezes dead in the water.

If the torpedo hit wasn't a kill shot, the vessel will speed up again to what ever speed it was doing, but that brief moment it went from lets say 12 knots to 0 knots is causing my other torpedo's to miss.
I've seen this happen very often and so far to memory I only have really noticed it with war ships. I don't recall seeing a merchant doing this, but this might also happen with merchants vessels.
If there is a fix already for this glitch, point me to one