When I was watching the Crew 2 launch this morning, I noticed that while the first stage was coasting up and back down, it kept giving off arc-shaped "puffs". I did not see any corresponding cold gas puffs in the SpaceX livestream I was watching at the time. Does anyone know what these were?
The first stage is the lower, dimmer object in this picture. (The second stage had its engine lit, hence appearing brighter and with a large exhaust plume visible in the sunlight.)