I've heard something similar. What I heard specifically was that the front page algorithm had to keep digging deeper and deeper to populate desired content; that this somehow tanked the site.
(I'm not a dev or programmer, apologies if my Info isn't exact)
I would focus on lower weight and cardio. Get the blood pumping, maybe hit an exercise bike for a bit and see how you feel. If you still have gas in the tank and your soreness alleviates then hit some light weights.