Our developers will be interested in investigating the issue when connecting from version 4 to version 4. It might be an idea to submit your logs to forum[at]nomachine[dot]com making sure you reference the forum post if they are too heavy attach here.
This forum is for dealing with features and problems of version 4. This includes client and server and excludes compatibility problems with older versions, that are managed by our support channel. Any questions about 3.5.0, you can either submit a bug report here: https://www.nomachine.com/report-issues, or contact us via the website at Contact us below.