The current version 5.3 still has an old version of drivers for USB sharing. We are aware that these drivers may cause issues with some operating systems and hardware. We will provide an up-to-date version of USB drivers with the incoming v. 6 (which should be released soon). Once available, we expect that upgrading to v. 6 will help to solve also your issue.
ARCH Linux is not among the Linux distributions that we officially support, even if we are interested to make NoMachine able to work also on such platform, we cannot say when a fix can be made available. We have opened a new trouble report to track this problem: https://www.nomachine.com/TR06O07837, you may register to ‘Notify me when the TR is closed.’ to be informed when the fix is made available.