Not really a bug or anything properly reproduceable however i'm having some issues with project files corrupting when the editor has been open for a long time or a lot of single file saves have been done.
Basically, if C2 has been open for 4+ hours and a lot of iterative saves have been created I seem to be having some corruption issues, as per below screenshot.
You'll notice from the file size and timestamps it's not saving the data to the single file yet all items are still accessible in c2.
On close of c2 and re-open to try and load the file it throws a corruption error. This happens across 2 PCs so pretty sure it's not a HDD corruption issue, just seems to be when the editor has been open for a long time and has created multiple previews & saves.