Please check in the Server log if you no longer see long pauses in which even the log from LightstreamerMonitorText is missing.
In this case, the configuration change has succeeded, at least, in simplifying the scenario.

Turning to the disconnections from the Remote Adapter, as far as Lightstreamer is concerned, they cannot be a direct consequence of the load.
I suppose that the disconnections are caused by a crash of the whole process running the Remote Adapter (which may be an indirect consequence of the load). Can you confirm that there is a crash?