No breach of causality, the relevance of the ISS pass is that they’ll be on way to same orbit so their path will be same (subject to rotation of Earth over 25 min). I did see an unmanned Dragon on way to ISS last July, it was fairly spectacular you could see thrusters firing. Not as spectacular as the 2009 STS128 launch. Watched it live then went outside and watched the shuttle Discovery and its external fuel tank pass over, they’d just seperated.
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