You don't think 1:34 in "Out There" is downright sloppy editing? Listen to the string note when Frollo enters, after the strings already finished playing... Compare it to the original album version of the song. Pretty sure something like that could have easily been fixed/avoided.
Yeah, conspiracy theory time. That definitely looks like the final master had more music at the start of disc 2, which someone hacked off to reduce the runtime, then didn't bother adding silence at the head of the master (as is standard for a pressed CD).
The final track on disc 1 that everyone is talking about does not end abruptly, so I'd very much doubt the omission of the segment in question was some manufacturing glitch, or a problem with the masters that was passed on to those streaming services. I am expecting the physical set to be the same.
Personally I don't think this was a decision they made intentionally. Not for a set like this. The missing segment was likely meant to be appended to the first track on disc 2 to keep the first disc's running time below the 77 minute mark - and hence reduce the risk of manufacturing glitches. Perhaps this decision was not documented or communicated well, so the score segment was forgotten about, and its space on disc 2 was then given to yet another demo track.
And with all due respect to Mr. Botnik (and I can fully understand that locating, extracting, mixing, mastering and producing this 25-years-old contnet cannot have been easy) this set does not contain "everything". There were number of demos for unused songs among the DVD special features (can be found on YouTube) that didn't make the cut here. Some of those were far more interesting than those iterations of the same demo they ended up including.
TheTelmarine got a reaction from TSMefford in Alan Menken's The Hunchback of Notre Dame (1996) - 2021 Walt Disney Records Legacy Collection