@Nicolas Zemmin if you hook a fish and that fish unspools your line to the point that you can see the surface of the spool with less than 10 yds left, you mind as well consider that line is done. Youre not getting that back.
Ideally that knot should be at bottom of the spool and not in the middle or top. If it rests at top or middle of the spool it might tangle the line while casting.