Guess what? My adult male is currently refusing food as well!
Adult males do this, it isn't that big of a deal, especially if their body weight/mass is still looking appropriate for their length. If he still looks the same as the photos you posted before, I wouldn't be so worried.
If you want to brumate him properly, he will likely come out of it with an appetite like you've never seen. If you have a wine cooler (which is what I use) drop the temp to 54.F and leave him with a dish of water and substrate for 60 days without disturbing him. Then bring the temps back up over the course of a week - and he should start eating again like clockwork.
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