As Dan25 suggested we will check if there are problems with custom session. If we find anything wrong the client side (player), it’ll be fixed.
If there are problems with NX 3.5.0 server, they need to be dealt with by the support team for those customers still using 3.5.0. Any bugs will be investigated according to the terms and conditions of the support contract.
This forum is, as a rule, for problems related to NoMachine 4, but since this could well be a problem related to client 4, it would be useful to take a look at the session file (.nxs) and also the server logs 🙂 You can send logs to issues[at]nomachine.com. Put the topic name in the subject of your email.