In a recent question of mine, I encountered what I think is a bug when I tried to put a regular blockquote between two spoilers:
!This is spoiler 1.
"This is the regular blockquote".
!This is spoiler #2.
As you can see, it renders everything as one big blockquote as well as the exclamation points that are supposed to make something a "Spoiler". Trying to make the middle blockquote into a spoiler, resulting in three sooilers in a row, also fails.
It happens on both the mobile site and the full site.