Windows Server 2019 - Slow File Explorer browsing while transferring files

Occasional Visitor

We are seeing a performance issue when we are transferring files and trying to view\traverse the same folder through file explorer, there is a 5-10 second delay when trying to traverse the folders while the transfer is occurring.

 

We are using DFS-N, servers are all Windows 2019, clients are all Windows 10 Pro 21H2. File Server is a Hyper V VM, storage is connected via iSCSI through Windows not File and Storage Services.

 

Anything that pops out or anyone has seen would be appreciated, we've been losing some hair from this one. 

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