Fixing it is not so simple, because we need to add support explicitly for KeeAgent/Pageant. The FR has been made public here: https://www.nomachine.com/FR09Q03877
If you are using Putty, you could try using the option ‘Private key’ authentication with ‘Forward authentication’ option checked, making sure that it’s in the OpenSSH format or convert it. To do that choose the key file in the PuTTYgen main window. Then go to Conversions->Export OpenSSH key to export your private key and save it.
Some useful info about key based authentication with NX protocol here and for SSH protocol is available here: https://www.nomachine.com/AR02L00785 and https://www.nomachine.com/AR06O00932
btw, when a TR has a “due to be fixed in ” version, it indicates a target, we can’t however guarantee that the a fix will be found, and the target should change to the version that we are currently on. For some reason, that particular TR wasn’t updated to show a later target version.