hey mate
Common problem with braid, you have to really pack it on tight and i mean tight as tight as you can get it on the spool. As what has happened is it is not tight enough and has loose loops in the line so when tension is put on the spool it cuts in on itself. You can eitheer respool ist back on the reel or another option is let it out the back of the boat when in motion and wind it back on.