Almost 3 weeks ago we migrated an old forum from myBB to Discourse, bringing all the content and creating proper 301 redirects for all old threads, categories and topics. Since the move, our incoming traffic from search engine has dropped over 20%, so far inexplicably.
Our SEO consultant has highlighted that serving different content to the crawler may be one of the reasons that Google treats the new forums so poorly compared to the past. The version seen by Google of a topic page for example contains less content than what a browser sees (no indication of reply, login, search or suggested topics, among other things.)
Has anybody noticed similar traffic drops after a migration from ‘old-school’ html forums? Any suggestion on how to fix things on our forums?