The last bit of information cpasjuste shared (in a conversation) on those random crashes in some (limited group) of games was, that it might be related to a racecondition mishap in libnx. So if a game is using different threads (as in sfx and music, and speech, and screentransitions), in some games a certain tread (think parallel processing, multi cores - stuff like that) might finish "too late" for the game to have the results accessible. Then certain games might crash.
yellow8 already looked into it - but wasn't able to completely fix it the first time around. Also as long as primarily ScummVM is affected this might not be a category A priority. So basically its a tough thing to fix - but they are on to what might be causing it. No ETA on a fix.
Games believed to be affected so far:
Broken Sword 1 (but not 2)
Starship Titanic
and now probably
Adibu
Other games that don't load as expected:
Kings Quest 7
Dreamweb (I have to still doublecheck this title on a windows install)
All other tested games, seem to work fine so far (might be subject to change, only tested most for a few minutes each..

), this includes "all" popular Lucas Arts titles (edit: maybe except Loom, if my memory serves me right (didn't test this one personally)), and even more niche titles such as LSL7 and Gabriel Knight 1 and 2. (monkey3 has sfx issues according to the changelog.

)