From the Archfey warlock patron feature Misty Escape (PHB, p. 109).
When you take damage, you can use your reaction to turn invisible and teleport up to 60 feet to an unoccupied space you can see. You remain invisible until the start of your next turn or until you attack or cast a spell.
The part I think is redundant is the last part where it says "or until you attack or cast a spell". If I've used my reaction, I can't make an opportunity attack or cast hellish rebuke or a similar reaction spell, and by the time I can attack or cast a spell again, it's my turn again, so surely that's covered by the "until the start of your next turn" part?
Or am I overlooking something?