Hi,
sorry for the delay in getting back to you.
Logs were examined and we couldn’t find anything wrong. In the meanwhile version 4.2.27 has been released. Can you check the new one?
Many more tests have been run in the time being on that platform without any problem and honestly I can’t imagine how NoMachine could disrupt the system keyboard and mouse. Are you sure this issue is triggered by NoMachine and it is not reproducible when working on the physical machine? Can it be originated maybe by a system update?