I've had them pathing in the middle of cutscenes, appearing out of nowhere, or entirely blocking what's going on a few times now. Last night I also had T7 following behind my spaceship in space combat, which was really distracting, because he'd obscure parts of the screen at times while floating about.
I've also had my companions vanish and appear over and over after being on an elevator. One time T7 vanished in the middle of a fight and suddenly blaster bolts were raining down through the ceiling where he had somehow teleported through the world.
Here's my favourite screenshot that illustrates the pathing problems.
It's nowhere near as bad as KOTOR (the number of times I couldn't go through a door because I had to gather my party because one of them decided to have a wander was insane!), but it is still an issue.