Feed not purged when publishing/updating post

Feed is not updating when publishing/updating post. Not sure what is wrong. I have old PHP-version, maby that is the cause? These are my settings:

[x] Page caching via disk: enhanced
[x] Cache feeds: site, categories, tags, comments
Purge Policy: Page Cache [x] Blog feed
Specify the feed types to purge:
[x] rdf 
[x] rss 
[x] rss2
[x] atom    

[x] Handle XML mime type (note: this setting seems to be always on, even when I deactivate it and save settings the checkmark keeps coming back)

Nginx restarted: Yes CDN: Disabled

Environment: W3 Total Cache (Fixed) Version 0.9.6.1 WordPress 4.9.2 PHP5-FPM Nginx PHP 5.3.29-1 nginx/1.8.0 MySQL 5.5.38-1

debug.log:

[31-Jan-2018 08:03:38 UTC] PHP Notice:  has_cap kallades med ett argument som har <strong>upphört</strong> sedan version 2.0.0! Stödet för användarnivåer har upphört. Använd behörigheter istället. in /opt/www/domain.se/public_html/wp-includes/functions.php on line 4031

grep -R "has_cap" ./

./feedwordpress/feedwordpress.php:          if ($dude->has_cap('administrator')) :
./w3-total-cache/lib/Db/mssql.php:                if ( $this->has_cap( 'collation' ) && !empty( $this->charset ) ) {
./w3-total-cache/lib/Db/mssql.php:                return $this->has_cap( 'collation' );
./w3-total-cache/lib/Db/mssql.php:        function has_cap( $db_cap ) {
./w3-total-cache/DbCache_Wpdb.php:  function has_cap( $db_cap, $dbh_or_table = false ) {
./w3-total-cache/DbCache_Wpdb.php:      return $this->active_processor->has_cap( $db_cap, $dbh_or_table );
./w3-total-cache/DbCache_Wpdb.php:  function default_has_cap( $db_cap, $dbh_or_table = false ) {
./w3-total-cache/DbCache_Wpdb.php:      return parent::has_cap( $db_cap, $dbh_or_table );
./w3-total-cache/DbCache_WpdbInjection.php: function has_cap( $db_cap, $dbh_or_table = false ) {
./w3-total-cache/DbCache_WpdbInjection.php:     return $this->wpdb_mixin->default_has_cap( $db_cap, $dbh_or_table );
./w3-total-cache/Enterprise_Dbcache_WpdbInjection_Cluster.php:      if ( $this->has_cap( 'collation', $dbh ) && !empty( $charset ) ) {
./w3-total-cache/Enterprise_Dbcache_WpdbInjection_Cluster.php:          if ( function_exists( 'mysqli_set_charset' ) && $this->has_cap( 'set_charset', $dbh ) ) {
./w3-total-cache/Enterprise_Dbcache_WpdbInjection_Cluster.php:      return $this->wpdb_mixin->has_cap( 'collation', $dbh_or_table );
./w3-total-cache/Enterprise_Dbcache_WpdbInjection_Cluster.php:  function has_cap( $db_cap, $dbh_or_table = false ) {
./wordpress-seo/admin/class-yoast-notification.php:         $has_capabilities = array_filter( $capabilities, array( $this, 'has_capability' ) );
./wordpress-seo/admin/class-yoast-notification.php:                 return $has_capabilities === $capabilities;
./wordpress-seo/admin/class-yoast-notification.php:                 return ! empty( $has_capabilities );
./wordpress-seo/admin/class-yoast-notification.php: private function has_capability( $capability ) {
./wordpress-seo/inc/wpseo-non-ajax-functions.php:add_filter( 'user_has_cap', 'allow_custom_field_edits', 0, 3 );
./ewww-image-optimizer/changelog.txt:* fixed: has_cap with invalid argument not recognizing utf8-mb4 v5.2
./ewww-image-optimizer/common.php:              if ( $wpdb->has_cap( 'utf8mb4_520' ) && strpos( $db_collation, 'utf8mb4' ) ) {
./ewww-image-optimizer/common.php:              } elseif ( $wpdb->has_cap( 'utf8mb4' ) && strpos( $db_collation, 'utf8mb4' ) ) {
./ewww-image-optimizer/common.php:              if ( $wpdb->has_cap( 'utf8mb4_520' ) ) {
./ewww-image-optimizer/common.php:              } elseif ( $wpdb->has_cap( 'utf8mb4' ) ) {
./ewww-image-optimizer/readme.txt:* fixed: has_cap with invalid argument not recognizing utf8-mb4 v5.2

W3TC Compability Test:

Server Modules & Resources:

Plugin Version: 0.9.6
PHP Version: 5.3.29-1-dotdeb.0;
Web Server: nginx
FTP functions: Installed (required for Self-hosted (FTP) CDN support)
Multibyte String support: Installed (required for Rackspace Cloud Files support)
cURL extension: Installed (required for Amazon S3, Amazon CloudFront, Rackspace CloudFiles support)
zlib extension: Installed (required for compression support)
Opcode cache: Installed (APC)
Memcached extension: Not installed
Memcache extension: Not installed
Redis extension: Not installed
HTML Tidy extension: Not installed (required for HTML Tidy minifier support)
Mime type detection: Installed (Fileinfo) (required for CDN support)
Hash function: Installed (hash) (required for NetDNA / MaxCDN CDN purge support)
Open basedir: Off
zlib output compression: Off
set_time_limit: Available
WordPress Resources

/opt/www/domain.se/public_html/nginx.conf: OK
/opt/www/domain.se/public_html/wp-content: OK
/opt/www/domain.se/public_html/wp-content/uploads/2018/01: OK
Fancy permalinks: /%year%/%monthnum%/%postname%/
WP_CACHE define: Defined (true)
URL rewrite: Enabled
Network mode: No

szepeviktor / w3-total-cache-fixed

Feed not purged when publishing/updating post #557