diff --git a/.github/workflows/canvas-audit.yml b/.github/workflows/canvas-audit.yml
index d29b28f..4f1103d 100644
--- a/.github/workflows/canvas-audit.yml
+++ b/.github/workflows/canvas-audit.yml
@@ -23,7 +23,7 @@ jobs:
   canvas-interaction-audit:
     name: iPad canvas interaction stall audit
     runs-on: macos-15
-    timeout-minutes: 60
+    timeout-minutes: 80
     env:
       IOS_SIMULATOR_FAMILY: ipad
     steps:
@@ -78,6 +78,8 @@ jobs:
           path: ${{ runner.temp }}/photo-picker-test.log
           if-no-files-found: warn
           retention-days: 7
+      - name: Wait for the simulator host to settle
+        run: node scripts/ci/wait-for-audit-host.mjs
       - name: Run real native interaction workloads
         id: interaction_workloads
         run: |
diff --git a/package-lock.json b/package-lock.json
index 60bdc0b..4167ee4 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -11,7 +11,7 @@
       "license": "Apache-2.0",
       "dependencies": {
         "@expo/vector-icons": "^15.0.3",
-        "@mathnotes/mobile-ink": "file:vendor/mathnotes-mobile-ink-testflight-c56a32d.tgz",
+        "@mathnotes/mobile-ink": "file:vendor/mathnotes-mobile-ink-testflight-89cb900.tgz",
         "@react-native-async-storage/async-storage": "2.2.0",
         "@shopify/react-native-skia": "2.2.12",
         "expo": "54.0.34",
@@ -2567,8 +2567,8 @@
     },
     "node_modules/@mathnotes/mobile-ink": {
       "version": "0.3.11",
-      "resolved": "file:vendor/mathnotes-mobile-ink-testflight-c56a32d.tgz",
-      "integrity": "sha512-gNonN5GA95gGsHz7+xVf177+5udHNwePKpwoOEX9rGu861X43DoxI2TpAASv+bxdx0QGzx4BaXmBdgJlFWN+ow==",
+      "resolved": "file:vendor/mathnotes-mobile-ink-testflight-89cb900.tgz",
+      "integrity": "sha512-tgWEQfeTW+Tm9POnTM1BlMxnxD1+xt2LwFd61YkkiR1kQbiwfG+mmEGKTw1GbesLCRncANr+Uxs/BI0QsRvrDA==",
       "license": "Apache-2.0",
       "peerDependencies": {
         "@shopify/react-native-skia": ">=2.0.0",
diff --git a/package.json b/package.json
index 32204c0..a73083b 100644
--- a/package.json
+++ b/package.json
@@ -27,7 +27,7 @@
   },
   "dependencies": {
     "@expo/vector-icons": "^15.0.3",
-    "@mathnotes/mobile-ink": "file:vendor/mathnotes-mobile-ink-testflight-c56a32d.tgz",
+    "@mathnotes/mobile-ink": "file:vendor/mathnotes-mobile-ink-testflight-89cb900.tgz",
     "@react-native-async-storage/async-storage": "2.2.0",
     "@shopify/react-native-skia": "2.2.12",
     "expo": "54.0.34",
diff --git a/scripts/ci/wait-for-audit-host.mjs b/scripts/ci/wait-for-audit-host.mjs
new file mode 100644
index 0000000..9d22ad7
--- /dev/null
+++ b/scripts/ci/wait-for-audit-host.mjs
@@ -0,0 +1,33 @@
+import os from 'node:os';
+
+// Load averages on hosted macOS can include work outside the VM. Measure the
+// CPUs visible to this process instead, and leave the app's budgets unchanged.
+function sampleCpu() {
+  const cpus = os.cpus();
+  return cpus.reduce((sum, cpu) => {
+    const { user, nice, sys, idle, irq } = cpu.times;
+    sum.total += user + nice + sys + idle + irq;
+    sum.idle += idle;
+    return sum;
+  }, { total: 0, idle: 0 });
+}
+
+const intervalMs = 5000;
+const minimumIdleFraction = 0.35;
+const deadline = Date.now() + 8 * 60 * 1000;
+let previous = sampleCpu();
+let consecutiveIdle = 0;
+console.log(`Waiting for audit host: ${os.availableParallelism?.() ?? os.cpus().length} available CPUs, ${os.cpus().length} reported CPUs, minimum idle 35%`);
+while (Date.now() < deadline) {
+  await new Promise(resolve => setTimeout(resolve, intervalMs));
+  const current = sampleCpu();
+  const total = current.total - previous.total;
+  const idle = current.idle - previous.idle;
+  previous = current;
+  const idleFraction = total > 0 && idle >= 0 ? idle / total : 0;
+  console.log(`Host CPU idle: ${(idleFraction * 100).toFixed(1)}%`);
+  consecutiveIdle = idleFraction >= minimumIdleFraction ? consecutiveIdle + 1 : 0;
+  if (consecutiveIdle >= 3) process.exit(0);
+}
+console.error('Audit host did not settle; responsiveness measurements would be unreliable');
+process.exit(1);
diff --git a/vendor/mathnotes-mobile-ink-testflight-89cb900.tgz b/vendor/mathnotes-mobile-ink-testflight-89cb900.tgz
new file mode 100644
index 0000000..643565a
Binary files /dev/null and b/vendor/mathnotes-mobile-ink-testflight-89cb900.tgz differ
diff --git a/vendor/mobile-ink-source.json b/vendor/mobile-ink-source.json
index 5715b6f..731a2e1 100644
--- a/vendor/mobile-ink-source.json
+++ b/vendor/mobile-ink-source.json
@@ -2,7 +2,7 @@
   "package": "@mathnotes/mobile-ink",
   "version": "0.3.11",
   "source": "https://github.com/mathnotes-app/mobile-ink",
-  "commit": "c56a32dcd90d75fc1fef7d111e073841a5162179",
-  "sha256": "22e5cefb34304b75d4473790c1956629f43bbbbdf019483470a5b1db697b2b1a",
-  "pull_request": "https://github.com/mathnotes-app/mobile-ink/pull/65"
+  "commit": "89cb900c4b4175c6af8470d6d1113f77118fec95",
+  "sha256": "8d4f8a32f5a59348810b06acb4632393445a6e53e522d6f12ad0a15a50686734",
+  "pull_request": "https://github.com/mathnotes-app/mobile-ink/pull/66"
 }