Ended up plagued with this again for a few days, and figured it was server-side issues.. but eventually thought "why not check in another browser", so I did, and the problem was gone.
I don't know what the problem was and if it's due to kbin, the swap to mbin, is fedia-specific, or browser-specific, or some-action-that-I-took-specific, but clearing all the cookies and data in my browser for fedia.io has put things back to sane. If you read this and are having similar issues, consider trying as much (remember doing this will log you out).