I just lost 5 days of work in this save, it was a construction of 4167 blocks on top of the main monument, I can now fly through the main monument as if it isn't there, alien storage is gone, odysseus is gone which was anchored to the ground, storyline building is gone. I was swiching back and forth between main branch and experimental branch so I could keep building, maybe that is responsable for this. I have a old save where everthing is fine, but I lose 8 hours of work building a tunnel…