We are currently working on a project (REVIT 2019) that is hosted on BIM360 and we have been struggling with spaces becoming unplaced. This happened a couple months ago on level 1-3 of one of our models but not levels 4-9. We reach out to autodesk and they had said they had not heard anything like this before and we all assumed that it might be user error. We informed our team of what was going on and encouraged them to reach out before doing anything with the spaces. We noticed a couple days ago that the space on the same levels & in the same models had become unplaced once again. I wanted to reach out to this community to see if anyone else has experienced something like this before? Or if anyone had any ideas on why this could be happening. Any feedback is greatly appreciated!