OpenStudio Geometry Bug

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After finishing the 1st floor of my building, OpenStudio geometry floorplan tab became buggy and stopped creating any new spaces. when I use the rectangle shaped zone it makes triangles. and I can't create new spaces or assign thermal zones or add components to the building, the whole .json file just crashes. I have faced this problem more than once and I had to create a new .osm file for it to work. but it keeps happening.

Thanks.