SMB network share disconnecting intermittently

Running 14.3.1 Studio on Windows 10.0.17134 Build 17134.

I have an SMB3 network share from a FreeNAS-11.1-U4 server.

After maybe 10-20 minutes within a project, the SMB share will disconnect, all the media goes offline, and the "red X" icon shows in File Explorer. It's as if merely having Resolve scrubbing through the footage on the share is not communicating to Windows that the share is actively being used.

Why might this be happening, and how can I fix this?

Oops, silly mistake. Had been doing collaborative workflow, and different workstations had mapped the same share to different drive letters.