My hedgehog suddenly refuses to eat its favorite mealworms, any ideas why?

I've had my hedgehog for about a year now, and it's always been super enthusiastic about mealworms. Lately, though, it just sniffs them and walks away, even when it's clearly hungry. I've tried switching brands and even warming them up a bit, but no luck. I've also made sure the enclosure temperature and humidity are just right, as usual. I'm worried it might be feeling unwell or stressed, but aside from this change in appetite, it seems normal - still active and using its wheel. Has anyone experienced this sudden food refusal with their hedgehog? Could it be a sign of something more serious, or just a weird phase? What else can I try to encourage it to eat again?