Review round 7: when selecting a page failed (say the page a teammate
deleted moved the editor to one that would not load), no live read was
left running, and a later refresh fetched the page without starting one:
teammates' edits stopped arriving. A refresh that reads the selected page
now starts its live read if none is running for it.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>