I merged a change that should fix most of the errors you are seeing (ie. missing name/answerCount). It turned out these values were missing from the microdata:
https://github.com/discourse/discourse/commit/6e8876152c45c2bd7c2f1c0eb6a248f47de9f89c
The 3 problem urls in the last image appear to be a separate issue, 2 of them are emoji only posts with no text and the third is an image only post. But I ran them through the Schema markup validator by pasting the page source and all appear to have zero warnings or errors.
Possibly these 3 page issues will clear on a re-crawl.