I used a short piece of stiff plastic (HDPE) tube attached to the top of the sidestay between the mast and stay. Temporary (used duct tape around tube/stay), but it did keep the halyard from being pinched when the mast was at full rotation on the other tack/gybe.

If you've got a block attached to your spin bale on the mast, that may be getting flipped or pinned as well (especially if your halyard is slack when spin is in snuffer), making hoisting very difficult.