Found out a bit more:
These Yoast tables refer to staging:
_yoast_seo_links
_yoast_indexable – permalink links to staging
I resat the permalinks and ran SEO optimization once more, and this removed staging from _yoast_indexable, but not from _yoast_seo_links.
Seems like this fixed the Facebook problem, but I dont know if _yoast_seo_links will cause a problem.
Also posted this in Plugins/Yoast