we are not able to reproduce your problem in our labs. It may be due to your network interface configuration, from the logs you posted it’s hard to tell.
Could you please increase logs level by setting SessionLogLevel key in your /usr/NX/etc/server.cfg and /usr/NX/etc/node.cfg and send the entire contents of /usr/NX/var/log to us?
Instructions on how to collect logs: https://www.nomachine.com/AR10K00697
Send everything to issues[at]nomachine[dot]com and reference the topic title in your subject.