When sending multiple notifications, our .NET client session not found error. Sometimes we get this error right after receiving 1st notification and sometimes after receiving 10 notifications.

Here is what we see in client logs -

Lightstreamer.DotNet.Client.PushServerException: Session not found
at Lightstreamer.DotNet.Client.PushServerTranslator.C heckAnswer(LSStreamReader answer)
at Lightstreamer.DotNet.Client.PushServerProxy.Resync Session()
at Lightstreamer.DotNet.Client.ServerManager.Rebind(A ctivityController activityController)

Server logs shows -

08-Jul-16 17:56:32,819|INFO |LightstreamerLogger.requests |SERVER POOLED THREAD 10 |Sync error: Can't find session S5d3e6790e70d1262T5446234 on "Lightstreamer HTTP Server" from []

We are using the latest version of .NET Client SDK

Also, we changed ConnectionInfo.ContentLength to 0, so server can set the content length but didn't make any difference.

Any idea on what could go wrong?