Yes, it seems that this issue is file-specific. There may be something corrupted in the file that causes this behavior.
There are 2 things you can try:
A) Close the file, then open again with the "Open & Repair File" option checked.
B) Do a Forward Merge:
1. Create a new Archicad project based on the latest settings. 2. Merge the corrupt file into this new file and see if that fixes the problem.
Please note that if you had 2D elements manually drawn in Sections, Elevations, etc., those will not transfer with a Forward Merge. However, you can copy-paste these between the two files (unfortunately, associativity will be lost). Also, Views will not be merged so you would have to recreate them, and probably some other settings won't transfer either, only the geometry.
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Thank you very much for the report and I am very sorry for the issue!
From what you described, it looks like you cannot control the MVO in 3D windows on a specific file, is that correct?
If that is true, then this happens due to defect DEF-7764. We don't know how it happens, but the issue can be fixed with Open & Repair from Archicad 25 Update 4, which will arrive later this year. For now, you can forward the problematic file to the local support team for fixing.
I am very sorry for the inconvenience! Please let me know if you have any further questions!
Hello friends, I was having the same problem with the 3D stuck in a wrong MVO and this worked for me (for now): Go to a saved Plan View (section or floor plan) > change the MVO to default > select the stairs > F5 > (mine came back to normal) and then F5 again for the whole project to appear. This is the only way that I am able to see the full stairs and railing in my 3D view, but even if I save it, If i go to a view with different MVO and back to the saved 3D View, it comes back to the wrong MVO, even if I change it to default.
Don't know if it helped, but hope it is fixed soon.