I don't want to go into detail on everything wrong. However this is a weekly build that someone leaked and it has many issues and bugs. As well as many changes to the code and variables. Because of that old save files do not work. This was all posted clearly when I posted this release on patreon. So to clear it up nothing is wrong, this is meant for our testers to play and find issues, not for official release. With that being said many issues with this week's build have already been fixed in the w3 release. Which again these weekly builds were never meant to be released to the public.