I'm not sure I see where the contradiction or issue is? Present day Boba, in the Bacta tank, now knows the whole story, yes, however, Nomad Boba who just rescued Fennec did not know. He is thinking about, remembering, or dreaming about a time when he did not know. So, if Boba is remembering or dreaming about the past, it would not change the past. Let's say Din told him Vanth's story about getting the armor off the Jawas, so, Boba now realizes he came out in his armor and Jawas took it. So, when he thinks about that time, he now has the image in his head of him getting out wearing the armor. However, when he thinks back to first meeting up with Fennec, he didn't remember or know what happened, so in his memories he is still looking for it, because that is what happened.
Like I said, it's tricky because We're being given a 3rd person, cinematic, visual representation of Boba's dreams. They are balancing showing the audience what they know actually happened from Mando Season 2, with Boba's own experiences. Perhaps in Boba's "real" dream at that moment it is a blurry, hazy fog of blinding sun and strange eyes and hands running over him. But, it is kind of hard to get that experience across on the screen. Plus, that real confused memory might be the impetus of the Jawa eyes in his Vision quest. He remembers the Jawa eyes over him, but doesn't remember what they did.