I have little doubt that a lot of your lost upvotes comes from a packed home feed. I admit that I can't keep up with the few people I do follow. I only actively give look outs for yours and a few others posts. I don't think your content is the problem seeing as I am here still. While I can't say I've noticed a drop in upvotes (all of my posts are either boom or bust) I have noticed an increase in followers with no upvote from them. The only way I could give you advice is if you aren't enjoying yourself posting. Have fun and love what you do foodie.

(P.S. All of my big post I posted at about 11:55 California time. So about 40 minutes ago from right now.)