newRPL - can't restore to 39gs

[3298]

While I have no knowledge about how USB works or how newRPL uses it, a size limit reminds me of VPN affecting UDP traffic by lowering the max size, which can lead to dropped packets because unlike TCP packets the UDP ones cannot be fragmented. Let me throw an idea at the wall and see if it sticks: Conceptually USB hubs and VPN have something in common in that they tunnel traffic ... Are you using a USB hub? If so, try a direct connection.
(The culprit may not actually be a size limit; slow transmission that causes long packets to not be received in entirety before a timeout is over would probably have similar effects. The primary suspects for such bottlenecks are of course devices that literally sit in the middle of the connection, but it might be a driver too since those sit in the software section of the line, so to speak.)