[It's a lot of information to take in at once - and he devours it, running over all of that in his head and commiting every detail to memory. The last thing he wants to do is slow down a perfectly good scientific discussion by needing to hear things repeated.

Although, man, is now a time to feel a little stupid, because -]

I had the coordinates for my dimension a few weeks ago but not memorized and not here. [His expression scrunches up a little - it'd be kind of like wrinkling his nose, if he had a nose.] The transporter we were working with - we were only aiming for intradimensional use. Landing in another dimension entirely was an anomaly, so I didn't do much with the interdimensional data once we got back.

[In his defense, it was kind of an emergency and all.]

Tracking the energy signatures back got us the coordinates to get back, but those degraded quickly; a few days was all we had. We didn't run into the quantum issue, though - I'd guess it's the same principle you've described, and it was a close enough universe not to...snap the rubber band, so to speak.

[In short, getting back from the Ghostbusters crossover was probably easy mode compared to getting home from this one.]