My fishing partner uses spincast reels exclusively and for the fishing we do they are 100% fine. We are starting to have an issue with them though. Mid cast the line will just jerk to a stop, like there is a knot or tangle on the spool, but a light pull with you hand will free it. It gets very annoying and will eventually disrupt the fishing and the trip.

Could I be doing something wrong when replacing line? Something wrong with the line or the reel??