The blood moon? Nah, it's all sorts of wonky and so far as I'm aware the trigger is to all appearances inconsistent. One of the fellows I've been watching would get them at odd times doing... basically nothing. Killing an enemy, facing in a particular direction, so on, so forth. Occasionally it's repeatable, most of the time it isn't. Folks have sometimes gotten them several days in a row, and still others multiple times in the span of just a few minutes.
Near as I've heard the posited cause is something to do with the switch. Wii U folks don't seem to have the problem.
What, I haven't noticed 'cause I wasn't paying all that much attention, but... yeah. It's about the only major bug I've seen, so far, and the main playthrough I've been watching specifically goes out to break things occasionally, heh. Unless you count
whistle running, I guess. Which for the unaware is exactly what it sounds like. Hold whistle, mash run button, enjoy running for as long as you can keep the input going. Practically it's not that big of a deal -- horses are still much faster, paragliding is faster, it helps not at all with the vertical, etc., etc. -- but it's a bug that actually does something useful, heh. Bomb jumping might count, too, I'unno. If you get the timing down right you can get places you're not exactly supposed to (in that manner anyway) by exploding yourself in mid air, ehehe.