[karensg]

Bug

With ssiEnabled and a reverse proxy purger (Cloudflare in our case), refreshing a cached include does not purge the pages that embed it. The include itself is refreshed and purged, but the reverse proxy keeps serving the previously assembled page until its TTL expires.

Cause: RefreshCacheService::getSsiIncludeSiteUris() derives the include index from an index query string param:

$queryString = parse_url($siteUri->uri, PHP_URL_QUERY) ?: '';
parse_str($queryString, $queryStringParams);
$index = $queryStringParams['index'] ?? null;

Since the cached include URI refactor in 5.12.0 (29177e4), cached include site URIs are stored as _cached_include_{index}?{cachedIncludePathParam}=_cached_include_{index}, so $index is always null, the SsiIncludeCacheRecord lookup matches nothing and no embedding pages are added to $purgeableSiteUris in refreshSiteUris().

Reproduction

Blitz 5.12.15 (and current develop), Craft 5.11.1, SSI enabled, Cloudflare purger.

1. A page embeds craft.blitz.includeCached('counter.twig') whose template runs a tracked element query.
2. Save a matching element. The include is cleared and regenerated locally.
3. Blitz::$plugin->refreshCache->getSsiIncludeSiteUris([$includeSiteUri]), with the include's stored site URI, returns [] although blitz_ssiincludecaches has a row linking the include to the page.
4. Cloudflare keeps serving the old assembled page (we observed age: 67816, a signature counter 300+ behind the origin).

Fix

• Read the index from the _cached_include_ path prefix, the same way CacheRequestService detects cached includes, with a fallback to the legacy index query param for URIs created by versions before 5.12.0.
• Return early when no include indexes were found, instead of running a query with an empty IN ().

Verified against our production records: the patched lookup returns the embedding page for both _cached_include_92856835?p=_cached_include_92856835 and the legacy _includes?action=blitz/include/cached&index=92856835.

Tests

Three Pest tests added to RefreshCacheTest: current URI format, legacy URI format, and a non-include URI. I could not run the Pest suite locally (it needs a Craft test install), so please run it on your side. ecs check passes on the changed files; phpstan reports only the pre-existing implicit-nullable notice on addElementQuery().

[bencroker]

Thanks for the bug report and PR! Merged and released in 5.13.2.