Thanks, glad you enjoyed it. That's not an issue I have noticed so I'll add it on to the list of things to look into so I can find out what's causing it and get it fixed.
*EDIT:
I think this issue should be fixed now.
Not 100% sure I got it, but it was the thing that stood out as the most likely cause. I never noticed it happening and didnt notice it after the change so cant say for sure I did get it. My thought was that it could be the collisions with the mines and chests that alter the velocity of the fish, so I think it should stay the same (again, kind of shooting blind, but based off what I can see if that was the issue I think it should be fixed or at least better)