I've dropped out of witchspace way off course when there are multiple suns for some reason, is that a misjump?
Technically, that's the new Prevention of Insta-Death-by-Contact-Binary-Star safety protocols kicking in (they're not very good at telling whether a destination star is a "contact binary" or not) rather than a mis-jump, but yes, getting dumped exactly halfway between two binary stars that are 600,000 Ls apart is the closest thing we get to a "mis-jump" these days.
That used to happen to me a lot if I got a matchmaker server error when jumping into a new star system. Haven't seen it since upgrading to a newer, faster PC.
Back in pre-Horizons days, there was a kind of "mis-jump" that used to happen if someone attempted to interdict you while you were jumping - both you and the attacker would be slammed into the target star in your destination star system, suffering damage. Apparently, this was an intended bug, rather than a feature, so it was programmed away - now, commencement of hyperjump automatically breaks any interdiction.
But other than these examples, and Thargoids of course, the FSD is 100% reliable. There was talk back in the development stage of there being "dark systems" (rouge planets, uncharted mini-black-holes, etc) being placed on the galaxy map and if your route happened to pass near a dark system, the dark system would cause a mis-jump and you'd find yourself unexpectedly dropping out in the dark system. They decided not to implement this, though the "dark systems" are apparently still programmed into the galaxy map, awaiting some means of discovering them.