Even though you didn’t randomize characters, BWL ram is used so that players can choose specific characters, even on vanilla settings. I probably missed hooking one of the places that write to bwl, which would cause this issue.
You can revert Yoder in chapter menu → config → preview units.
If you have a save file from shortly before Yoder is loaded, then send it my way and I’ll try to fix the root cause of this bug.