In other words, ¿quien sabe? Do you appreciate the hectic pace of musicians' lives? Especially in 1927? Pee Wee could have been playing another gig by then, or even working out of town. Maybe, like Bix, he also was on a bender that day, but no one was looking for him.
It was a lucky break (for us listeners) that Pee Wee showed up to record on the 25th at all.