Hi Tom,
since you’re the man behind both, it’s hopefully the right place to ask. I played around with Gutenberg preview in WordPress 4.9.8 with GP 2.1.3 Premium. Certain of our pages show recent posts via WP Show Posts plug-in and defined categories.
Thing is, that a new Gutenberg written post did not appear in his section/page until I switched back to classic editor. Another strange behavior, but surely something for the Gutenberg folks, this post was not published in a scheduled time, obviously due to ignoring the time zone. Since this might be an indicator for you as well, I would like to mention. For the time left I killed Gutenberg but I’m afraid we will have to deal with “him” early enough again.
May I place a feature request as well? It would be really great to have WP Show Posts core within the theme. How about showing posts in user defined orders and choice in sections without going around the circle forth and back to WP Show Posts? I wondered whether it’s feasible to build a drop-down or any other kind of menu or a generator for short-codes like “Shortcodes Ultimate” from Vladimir Anokhin does.
Finally it’s time to say thank you. We never had a theme that offers such a good performance over time and a coherent appearance all over the web, devices, browsers and so on. Have a good day!
Mathias