The game will start to not let me move the camera and would start duplicating blocks
and will dupe any pinned blocks if you release them. It will also not move the original creation or delete the duped one. It also starts to do it exponentially more.
I actually found out what was wrong, i was making struts and starting the simulation before i placed the second point. I think the game was mistaking it as a new entity and not deleting it instead, while it kept the building scene one too
Ill look for an output log, and i dont use mods