diff --git a/.gitea/workflows/release-verify.yml b/.gitea/workflows/release-verify.yml
index bdb753ac..553d4cb8 100644
--- a/.gitea/workflows/release-verify.yml
+++ b/.gitea/workflows/release-verify.yml
@@ -53,6 +53,8 @@ jobs:
           echo "--- second hit on the same dict (expect HIT if nginx caches) ---"
           curl -sSI -A "$UA" --max-time 10 \
             http://flights-ui.devwebzavod.ru/api/dictionary/1/world_regions | grep -iE "^HTTP|x-cache|x-envoy" || true
+          echo "--- Full response from /ru-ru/onlineboard (for debugging 503) ---"
+          curl -s -A "$UA" --max-time 10 http://flights-ui.devwebzavod.ru/ru-ru/onlineboard | head -30 || true
 
       - name: Notify (success)
         if: success() && env.TELEGRAM_BOT_TOKEN != ''
diff --git a/scripts/ci/wait-for-url.sh b/scripts/ci/wait-for-url.sh
index f345c4c5..c9ab7138 100755
--- a/scripts/ci/wait-for-url.sh
+++ b/scripts/ci/wait-for-url.sh
@@ -38,4 +38,6 @@ while [ "$attempt" -le "$MAX_ATTEMPTS" ]; do
 done
 
 echo "fail: $URL did not return 2xx after $MAX_ATTEMPTS attempts" >&2
+echo "--- Diagnostic: Attempting to reach the URL one more time to capture the error ---" >&2
+curl -sS -A "$UA" ${AUTH_ARGS[@]+"${AUTH_ARGS[@]}"} -w "\nHTTP_CODE=%{http_code}\nTIME=%{time_total}s\nSIZE=%{size_download}\n" -o /dev/null "$URL" || true
 exit 1