Check-in file is successful but file is missing

Hi Guys,

Very often check-in a file is confirmed to be successful but, no file is uploaded and nothing showing in the audit tray either. We are using the EB version: 15.6.1. The issue can be avoid only when the user clears his cache beforehand. The problem is, during this process, if the local copy is selected to be deleted, the user will automatically lose the file. Can you assist please?

Thanks