Build mod doesn't seem to work

Hello,

I have this issue for a while, and the last updates didn't fix it. When I launch my game, it drives me automatically to choose the world I want to play, eventhough i clicked on "continue the game". However, when I want to start something in build mod, I saved it before logging off, but when I came back, my build has disappeared.

I search an answer for this issue, I am not the only one having those. I play with mods, however, people on internet having this problem said those were not the issue...