Hello @Anonymous and welcome to the community,
There is a possible workaround for people with custom workspaces that was found just a couple days ago in a phone support case. This issue isn't able to be reproduced with a default installation. For all the testers, going to Tools->Manage Scene states or Pressing X and then typing scene states will bring up the Manage Scene States window.
There was a case where a custom workspace was creating the problem, caused by an unknown script that modified the .cuix files. I have pasted that solution below. If this fixes the problem for you, it would be great to know about your custom scripts, plugins, etc. so I can figure out which plugin or script causes this problem. Thanks for that.
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When 3ds Max launches, it loads a default "template" first which may (or may not) include a separate workspace file. The template launches, then a workspace file can launch afterwards. However, a template file does not need to include a separate workspace file, and creating a new default template without a workspace may fix these reset issues. To do this:
1.Create a new, "clean" 3ds Max scene file and set the scene preferences exactly as desired (2.5D snaps, vertex and snap settings, Material Editor settings, UI colors, etc.)
2. Save this scene file as the default, with a custom name (it doesn't necessarily need to be "maxstart.max.")
3. Go to Help > Welcome Screen > Open Template Manager. Create a new Default Template by clicking on the Add New button in the bottom left, and point it to the 3ds .max scene file created in the above step. (Check the Scene File button in the middle of the menu and Select/Browse to that file.)
4. If the Workspace button is checked, uncheck it. A modified workspace file connected to the template may end up overwriting the initial template after launch with different settings. Unchecking the Workspace button and resaving the template helps ensure the saved template takes precedence first.
5. Set the new Template as the Default and then click on Done.
6. Other Workspace troubleshooting suggestions: if loading custom workspaces afterwards, uncheck the Ribbon settings (don't load them) and avoid using Enhanced Menus.
7. If possible, avoid launching and working in multiple copies of 3ds Max on the same machine – that can increase the chances of workspace/user preferences corruption.
8. Finally, avoid running scripts that change/overwrite saved, customized user preference .CUIX files.
Best Regards,