From what I can tell the time is correct across all devices. The SMB Server and Nextcloud server are on the same NTP server.
The clients are also on a NTP server but a different one.
Eye balling the time across all servers they are all within at least 2 second if not 1 second. the SMB server doesn’t have a GUI so I have to run date from the terminal, and I can’t run it at the exact time. So it is hard to tell.
I have also run a re scan multiple times with out success.