When you send a message while the agent is working, it's now delivered at the next possible opportunity, instead of being queued until the agent finishes its turn.
This means the agent acts on your feedback sooner and doesn't waste time on unnecessary verification steps.
Most people won't need to change how they use Amp.
If you do find Amp steering too abruptly, we've found that it works well to phrase your prompts like "When done, then ..." instead of "Now, ...".
Ship, Review, and other builtin actions still queue, because usually you want to wait until the agent is done before shipping or getting a review.
If needed, you can still queue from Amp or queue in the Amp CLI.