Since you claim other nfs devices do not have an issue with the server, my first idea is to inspect the infrastructure between the Vero and the nfs server, have a look here: [How To] Check Network Performance with iperf3
Since you claim other nfs devices do not have an issue with the server, my first idea is to inspect the infrastructure between the Vero and the nfs server, have a look here: [How To] Check Network Performance with iperf3