A damaged roller will cause wrapping but, before replacing the roller I would eliminate everything else.
The brake needs to be free of rust and the brake pad deglazed and in good condition. It should be tight enough that with the brake engaged, you can barely turn the drum. (think a tractor that the power steering has gone out)
Make sure the brake is releasing when the wrapping process starts.
The net channel need to be clean all the way across. BEWARE OF KNIFE. In effect, the net is being pushed to the bale when it starts. Any resistance will prevent it from going back to the bale.
Make sure the fishplate flap inside the chamber is going all the way down. When you raise it and drop it, it should fall flat. No debris beneath or bent. If it doesn't go down completely it can block the net.
I would check the net path very carefully. It the net gets blocked it will back up wrap around the roller.
Make sure your knife isn't broken or damaged and going back to the home position. It has to cut cleanly as to not leave a tail that will catch. If it doesn't go to the home position it can block the net path as well.
If the baler has been in high moisture hay, my guess would be the net path needs a good cleaning.
Good luck