Hi,

In the xkey vmod documentation, keys in the pages headers must be separated by spaces and not comma.

https://github.com/varnish/varnish-modules/blob/master/docs/vmod_xkey.rst

"Alternatively you may instead use a single header with space separated values like xkey: 8155054 166412 234323."

So when varnish associate the keys to the pages, instead of "content-249" we have "content-249,"

eZPlatform is not able to purge the keys when a content is modified in BO.

You must change the EzSystems\PlatformHttpCacheBundle\Handler\TagHandler class :

    public function addTagHeaders(Response $response, array $tags)
    {
        $tagsList = $response->headers->get($this->tagsHeader);
        $tagsList .= ' ' . implode(" ", $tags);
        $response->headers->set($this->tagsHeader, $tagsList, true);
    }

Regards,
Dominique