The act of measurement on the second particle destroys the entagled state of the pair. That effect can be measured on the first particle's side (which may be far away... on the other side of the galaxy maybe).
But to see/interpret the effect on the first particle, you need to know what the measurement on the second was, and that information needs to be transferred across the galaxy by conventional means.
Honesty quantum mechanics sounds more like a bug in the universe or some quirk we just don’t understand yet.
Honesty quantum mechanics sounds more like a bug in the universe or some quirk we just don’t understand yet.