My files sit in OneDrive, so I have tried syncing, unlinking and linking my account, keeping files on disk, and starting a new vault. But nothing has worked so far.
Obsidian is basically unusable.
Version
Version 1.7.7 (Installer 1.4.14)
macOS Sequoia 15.1 (24B83)
I would try moving or making a copy of the vault somewhere outside of the main OneDrive folder (or a folder watched by OneDrive) and using it for a bit.
/Users/YOU/VAULT-NAME/ is clear of OneDrive, iCloud Drive, etc., and would be fine.
My vault in OneDrive is behaving at the moment, but sometime last year after a macOS or OneDrive update (I don’t know which), it wasn’t. Deleting notes would freeze the Obsidian UI, switching tabs would lag, creating new notes seemed to take forever and so on.
Moving the vault out of OneDrive immediately cleared up all of the problems. My other vaults not stored in OneDrive were fine. I eventually moved that one vault back into OneDrive and it’s been fine since (always keep downloaded is set for that folder).
Not saying any of this will solve your issue, but it’s something to investigate.