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.
Wilson Six.One 95 16X18 Pacific Natural Gut @ 58
Strung Weight 356g 352g Balance 31.5cm 31.3cm