Try this.
Open applications/portal/modules/front/portal/portal.php
Find:
$table = new \IPS\Helpers\Table\Content( 'IPS\forums\Topic', \IPS\Http\Url::internal( 'app=portal&module=portal&controller=portal', 'public', 'portal' ), $where, NULL, NULL, 'read' );
Replace With:
$table = new \IPS\Helpers\Table\Content( 'IPS\forums\Topic', \IPS\Http\Url::internal( 'app=portal&module=portal&controller=portal', 'public', 'portal' ), $where, NULL, FALSE, 'read' );
Save. Just let me know if it works and will confirm for next version.