So you and your buddy(ies) wanna play online but don't want to experience the glitch? No problem, heres what you do:
-The person whos inviting his buddies into his game has to set his mode to private and has to set the maximum player slots to accomodate his friends.
-Invite your friends
-Enjoy game without fear of experiencing the save glitch.
The reasoning behind all of this is because when near other players and get asked to join their game, that right there activates the glitch. But if you have a private game with the maximum allowed players in your group then it will stop asking you to join other peoples games, therefore halting the save glitch.
I spent 2 hours with this to confirm this is true. Me and my uncle played, so i set it to private online, 1 private slot available and i invited him and we played 2 hours and every single time it saved our progess.
Not sure how to fix that problem, since i never had to patch the game when i started playing (thank god). But i heard that if u downloaded the patch and want to play online with people who have not downloaded it, you can delete the patch. But i do not know if this is 100% accurate or true.