@Alliecat7803
Like usual, DICE isn't worried with this BUG as it becomes obvious by the lack of any feedback on this up to now.
I supposed it's her model that dictates the direction because of the spin shown in OP's first video. There she turns 180 degrees because dash strike is used while her model is facing the camera. One thing is certain, it isn't a constant angle tilt, because in normal conditions she does dash strike towards where your aim dot is pointing to, but when the bug occurs she may tilt 90 degrees like you experienced, 180 degrees like shown in the first video and sometimes other angles as I've already experienced small (<90) and big tilts (>90) alike.
So I believe there is some game object which is dictating the direction Dash Strike is supposed to go, which in normal conditions is in sync with your aim dot (pointer), but under certain situations may desync causing this angle tilt towards somewhere "random".
I supposed it's her character model, but it's more likely that it's her character object, the one which the model is put onto. But not having the tools to dissect the game I can only assume stuff.
What is important here is that the BUG is more of an event like BUG then a state like BUG: it isn't a state, like the disabled block bug was, where an event would trigger a bugged state that while active it would make your block simply not work. It's more like the high speed collision damage BUG, which only triggers when bumping into an object with high speed causing some damage.
Here an event that desyncs the direction the camera is facing and whatever dictates the direction that her skill is supposed to go, makes the ability tilt the camera and go in the "wrong" direction.
Last but not least, this isn't exclusive to Rey's Dash Strike, but seems to be more notorious. I experienced this BUG with all rush like abilities that don't have an auto-tracking: Luke's Rush, Obi's Defensive Rush, Yoda's Dash Attack, Han's Shoulder Charge, Chewie's Slam, Maul's Spin, and Grievous's Claw Rush.