diff --git a/.github/workflows/ios-nightly-percy.yml b/.github/workflows/ios-nightly-percy.yml
index e7296b24a..75c24e6a9 100644
--- a/.github/workflows/ios-nightly-percy.yml
+++ b/.github/workflows/ios-nightly-percy.yml
@@ -137,7 +137,8 @@ jobs:
           REFRESH_UNSTABLE: ${{ inputs.refresh_unstable }}
 
       # Rebuilt on top of maps-docs main every time, so it never conflicts with the docs pushed
-      # to main by update-docs.yml. maps-docs opens the PR from it.
+      # to main by update-docs.yml. maps-docs opens the PR from it. Only examples-screenshots is
+      # compared with the existing branch, as main itself moves with almost every docs push.
       - name: Push the screenshots branch
         if: steps.download.outcome == 'success'
         working-directory: maps-docs
@@ -159,7 +160,7 @@ jobs:
           } > "$RUNNER_TEMP/message.txt"
           git commit -q -F "$RUNNER_TEMP/message.txt"
           cat "$RUNNER_TEMP/message.txt" >> "$GITHUB_STEP_SUMMARY"
-          if git fetch -q origin "$BRANCH" && git diff --quiet FETCH_HEAD HEAD; then
+          if git fetch -q origin "$BRANCH" && git diff --quiet FETCH_HEAD HEAD -- examples-screenshots; then
             echo "$BRANCH is already up to date"
             exit 0
           fi
diff --git a/scripts/ci/update-doc-screenshots.js b/scripts/ci/update-doc-screenshots.js
index 06766840f..433cf21fd 100644
--- a/scripts/ci/update-doc-screenshots.js
+++ b/scripts/ci/update-doc-screenshots.js
@@ -4,7 +4,7 @@
  * examples-screenshots folder, drops screenshots of removed examples, keeps screenshots.json
  * in sync and writes a markdown summary of what changed (empty if nothing did).
  *
- * excludeFromPercy examples differ by 2-80% between runs (animations, timers), so they are only
+ * excludeFromPercy examples differ by up to ~80% between runs (animations, timers), so they are only
  * replaced when new, when the screenshot size changed or with REFRESH_UNSTABLE=true.
  */