Fixed in testing, please get the latest version when uploaded.
Sorry not in current work plan.
That’s okay, there are other ways to contribute. May be we can take forward the preparations you have done and send you final component code for custom post types. You can then review it and add to the plugin if its good enough. I will need some pointers to get started.
Yes, Caching for known users is disabled and was using Legacy page caching.
I switched to PHP caching which temporarily fixed the problem as it created a hierarchical structure for the site’s pages.