Workaround when filters don't appear anymore on left column with the elasticsearch module for Magento.

Collection.php

<?php
// app/code/community/JR/Search/Model/Resource/Catalog/Product/Collection.php
// Making an override would be better!

protected function _getParams()
{
    $store = Mage::app()->getStore($this->getStoreId());
    $params = array();
    $params['locale_code'] = $store->getConfig(Mage_Core_Model_Locale::XML_PATH_DEFAULT_LOCALE);
    $params['filters'] = $this->_searchQueryFilters;
    $params['range_filters'] = $this->_searchQueryRangeFilters;

    if (!empty($this->_sortBy)) {
        $params['sort_by'] = $this->_sortBy;
    }

    if (Mage::app()->getRequest()->getQuery('limit')) {
        $this->_pageSize = Mage::app()->getRequest()->getQuery('limit');
    } else if (Mage::getSingleton('catalog/session')->getLimitPage()) {
        $this->_pageSize = Mage::getSingleton('catalog/session')->getLimitPage();
    } else {
        $block = Mage::app()->getLayout()->createBlock('catalog/product_list_toolbar');
        $this->_pageSize = $block->getDefaultPerPageValue();
    }
    if (Mage::app()->getRequest()->getQuery('p')) {
        $this->_curPage = Mage::app()->getRequest()->getQuery('p');
    }

    if ($this->_pageSize !== false) {
        $page = ($this->_curPage  > 0) ? (int) $this->_curPage  : 1;
        $rowCount = ($this->_pageSize > 0) ? (int) $this->_pageSize : 1;
        $params['offset'] = $rowCount * ($page - 1);
        $params['limit'] = $rowCount;
    }

    if (!empty($this->_facetsConditions)) {
        $params['facets'] = $this->_facetsConditions;
    }

    return $params;
}

view.phtml

<?php
// app/design/frontend/<package>/<theme>/template/catalog/layer/view.phtml

// Add this on top
$this->getLayer()->getProductCollection()->load();

// Rest of code...