Guy keeps asking me over past 8pm. Is this a red flag or just how his schedule is?

Month in. He’s 30. I’m 26. He works and is in school and studying for a huge exam after completing law school.. so I know his hours are pretty booked. But the last few times we’ve made plans he always says he has something like a zoom meeting with a professor or something at 8 and asks me over for 8:45pm. We usually hang out and have sex so now im nervous he just wants sex. Is this a red flag?
Guy keeps asking me over past 8pm. Is this a red flag or just how his schedule is?
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