Deleting mask bezier points causes crash

New problem I've encountered. When adjusting mask in Premiere, sometimes trying to move the mask bezier points causes them to duplicate, and then deleting those duplicates causes Premiere to crash. So you end up with a pile of mask points on top of each other than you can't delete. Have tried deleting the cache, resetting preferences, and making a copy of what I'm trying to edit. Really don't want to start drawing this mask again for a bug that may spring up again. Also when trying to group select them for movement, it assumes you want to adjust the curve handles rather than move the group.