After the fix committed under
LPS-65221 there are some options that users should know about SPA cache configuration.
Before that, all SPA render requests that didn't belong to a portlet (no p_p_id in URL) were cached indefinitely, and that may confuse users as the content won't be refreshed. Configuration option to change that is available in the LPS description.
Please contact me or Bruno Basto if you need more info.