After a few minutes SSLVPN users lose access to internal resources. NetExtender/Mobile Connect connection is still active but the users are not able to reach any internal resources.
Issue is caused by the NetExtender/Mobile Connect internal logs reaching its maximum limit. This usually happens after enabling the Debug Log Level under "NetExtender/Mobile Connect Service Settings" inside Services| Settings.
As per our engineering department, issue has been solved with firmware126.96.36.199-17sv. As a workaround you can also set the Log level to "Notice" instead of "Debug" as shown in the screenshot below.