it's really strange that Tyr, despite being portrayed as an excellent scientist, says he doesn't know what caused the Mæron to bring Tucker over because he made a lot of "seemingly superfluous changes" in a single experiment, which is something you never do especially in code, and if you're working on something of dubious origin like the Mæron double so.
So either he's just lying to Tucker and he knows what caused it, or he's just Unfathomably incompetent