`ClearAllPoints` invalidated the node, so an anchorless frame lost its rect at once, with everything anchored to it, and any region whose resolve failed stopped drawing.
In 1.12.1 `ClearAllPoints` (`0x7a2b70` → `0x767620`) only frees the anchors, queuing no resolve, so the rect stands. Only the node's own invalidate re-resolves it; a failure (`0x768d20` at `0x768d55`) clears the valid bit and skips slot 0, so its dependents keep their rects. A Texture keeps drawing its last vertices (`0x7706e0` checks only its texture); a FontString stops (`0x773080`, `0x7730b7`). A new string, font or spacing forces a store (`0x771ea4`).
Each node now carries an entry state, and takes a recomputed result only when invalidated or a target stored a new rect; a failed Texture's last quad is kept, and the full derive and the incremental pass read the same state.
Tests bite on the parent; the verifier is green.
Fixes#942Fixes#943🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
