That some times happens with the bigger spools as theres a lot of mass getting spun up to speed right at the start of the cast.
And yes line level is also important.
I tend to have no knots in my fishing reels apart from the shockleader knot.
When your casting aim for a smooth application of power from the start to the finish without snatching at the cast .
A jerky snatched cast is a blow up waiting to happen