I like glitches, but I really don’t know much about games and their code. If I’m asking about a glitch (e.g. an iron golem falling through the floor in MC Dungeons), can I ask for specific code that may have caused this?
Yes (or: no, you can't ask for specific code that may have caused a glitch.)
'Code' indicates someone would have to dive into the programming of a game. Apart from this not being something we tend to do in general, I presume most - if not all - cases will be closed as off-topic for falling under Game Development.
Even asking why a glitch or bug (by their very nature being unintended) occurs at all would fall under that umbrella.