The only issue I've ever had with with mains. On a one-piece, I always make sure that I string at least one cross and then tie off on that. Seems like a cross holds tension better due to friction I guess.
On a hybrid where that is not possible, I don't increase tension either. I agree with the others that practice makes perfect and learning to cinch a knot is key.
Volkl C10 Solinco Tour Bite 19 @ 52/49