From what I saw on the discord in the new version new bugs appeared and so there are several that could not be corrected from one version to another.
It makes me sad as well because it has to be very difficult to make a game like that, so if it's not working no matter how hard you try, it must be frustrating.
Instead I would just keep improving the 3DX room and take what works well for a new project, no open world, but with story mode and character creation, more similar to the style he had in Ren'py, that would be great.