Crush likes my photo at 1 am?

We are like best friends and he is really cool but he is never up past 10 pm, it shows on my phone that he liked my photo but when I look at the pic it doesn't show that he did, it's like he unlike it after, so what's up with that? Should I joke around and ask about it or just leave it be?
Crush likes my photo at 1 am?
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