More than one method of persistence

Both Persistence methods create records at the same time. So in your example, the SSL session ID changes so the SSL persistence record can't be used. However, there is a source IP address persistence record that is used based and identified based upon the client IP and destination VS and Service Port.

So, the 'backup' method doesn't recognise the session but recognises the client based on layer3 and 4 information. Note that (OneConnect notwithstanding) the TCP connection within which the SSL session ID changes has already been persisted and that won't change, it's only new connections that will use the backup persistence method.