@welje I have had sever issues with yoast free that I have been trying to troubleshoot on my own.
Last nights( by last night I mean this am still havent slept ) break thru is this. Yoast free bread crumbs on is faulty with some part of my set up. Host? I am on apache http1.1 NGINX – I have not done the recommended yoast rewrites. Theme – I am using the Elementor Hello theme with a custom child theme that I wrote ( this could be the flaw ) Elementor pro with the Yoast Bread crumb saved as a global template. My issue was unable to save any page in elementor pro due to none stop 500 server error.
The fix was deactivating Yoast free. Which sucks cause I love yoast and really want to use it, in 2015 it helped me organic rank all my clients.
Your posted issue with yoast being unable to analysis the words with gutenberg has been reported a few weeks back with the elementor pro customer support. It affects way more then just the gutenberg editor.
Yoast has been tragically broken for a while now and we all have been waiting on Gutenberg release so they can say yes this it is now time to devote to patch. It does not make sense as a company to patch before release. Look at how many Nvidea drivers they push in beta to find a flaw in the game they beta pushed for. I support yoast waiting for Gutenberg release to patch.
Some other things you might not have seen yet that we are all sitting on… Yoast no longer interfaces with any of the web master tools. It does not submit sitemaps to create robots.txt on my config. Unknown cause.
My config is likely the cause due to my apache server and NGINX cache but… Most modern hosts have this so yoast needs to step up their game to support modern.
The Interface with Web master tools is gonna be hard to fix cause Google changes something pushes it then changes it again in the timeit takes your cache to expire.
I do not think Google has a deployment roadmap and they do everything live.
The short of it, foe me was too loose the kick ass bread crumbs and deactivate yoast free and reindex with search engines manually( for all clients )
I would like to think yoast is aware of all these issues and is just making a roadmap on a white board in an office while the coders nod and drink monsters.
