For now, I’m moving this to #Help. Later, if we solve this as a missing Obsidian feature, we can put it back in Feature Requests.
Whenever something strange is happening and iCloud is involved, I first suspect iCloud as the source of the problem.
For example, in this thread, the user’s settings files were being duplicated. And I am assuming it was iCloud causing it. There are so many workspace files in the .obsidian folder
Could you search inside your .obsidian folder, and see if you notice any strange duplicated files?
Can you please try copying your vault outside of iCloud, and see if the issue persists? I would try to isolate whether iCloud is reverting your settings files. (Reminder to backup your vault before moving or editing your settings. Copying should be safer.)
Also, I am not very familiar with Windows 10. Is it normal that you have iCloud inside One Drive? There is a chance that you have two separate syncing solutions fighting each other, which could cause data to be reverted, or conflicted.