Serious bug - Local files will be deleted when the synchronization program malfunctions

When my computer showed that the authorization had expired, I created a folder in the local network disk directory and uploaded files.
Then I noticed that the authorization had expired.
After I re-authorized, I found that the files still hadn't synchronized, and the program indicated that real-time push events were unavailable.
I restarted the client, but the newly created folder and files were gone.