He tends to go on vacation after they successfully launch though

He does? He certainly wasn't on vacation during Artemis II:

• [Eric Berger] As Artemis II zooms to the Moon, everything seems to be going swimmingly
• [Eric Berger] Artemis II is going so well that we're left to talk about frozen urine
• [Eric Berger] The Artemis II mission has ended. Where does NASA go from here?
• [Eric Berger] As they got close to the Moon, Artemis II astronauts were eager to land
• [Eric Berger] Artemis II pilot (Victor Glover) talks about what it was really like to fly and land in Orion

I don't think there have been enough Artemis launches that one can infer a strong correlation to Eric Berger's vacation days :)