Sublime recreates every TextCommand instance whenever any plugin loads,
which dropped colored_lines and restarted the region key counter: old
overlays were never erased and keys were reused. RenderState now lives on
terminal.render_state, which survives reloads.
The renderer pinned a viewport dragged into sublime's past-end room. With
scroll_past_end off there is no such room: sublime clamps to bottom_y, so the
trigger can only fire against a stale anchor, which following() already
resolves on the next frame.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
