Hi Diego,
There are two different applications; either 'Drive File Stream' (Their G-Suite application) or 'Backup and Sync' (Their Free/Consumer application). Please confirm which one you are using and what version.
Can you confirm you are doing these tests with Project Sharing? We are having issues with project sharing and drive file stream where there are commits that vanish, corrupt vwxp files (have no idea how) or extremely slow commits when only a single person is working in the file.