Submitting from answer mode brings back the earlier messages, the composer
and the nav in one layout. That reset the log's scrollTop to 0, and the
scroll event it fired read as the learner scrolling up — undoing the follow
send() had just armed, so the reply landed out of view, 1,812px below. A
move made while the log's content or box changed size is now taken for
layout, not for the learner. Scrolling up during a reply still lets go.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
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