{"id":893,"date":"2024-05-07T11:45:11","date_gmt":"2024-05-07T11:45:11","guid":{"rendered":"https:\/\/kb.shortpixel.com\/docs\/bulk-optimization-process-does-not-behave-correctly-whats-happening\/"},"modified":"2025-08-27T08:40:53","modified_gmt":"2025-08-27T08:40:53","password":"","slug":"bulk-optimization-process-does-not-behave-correctly-whats-happening","status":"publish","type":"docs","link":"https:\/\/kb.shortpixel.com\/knowledge-base\/article\/bulk-optimization-process-does-not-behave-correctly-whats-happening\/","title":{"rendered":"The bulk optimization progress bar jumps around. What&#8217;s happening?"},"content":{"rendered":"\n<p>We have received some reports where the bulk optimization process wasn&#8217;t behaving as it should. For example, it would start at 11%, then would skip directly to 100%. Then, in 20 seconds or so, again it would show 11% optimization and again would skip to 100%.<\/p>\n\n\n\n<p>For cases like this one, you should <strong>take a look at your cache plugin<\/strong>. For example, W3 Total Cache has an &#8220;<strong>Object caching<\/strong>&#8221; feature which interferes with <a href=\"https:\/\/wordpress.org\/plugins\/shortpixel-image-optimiser\/\" target=\"_blank\" rel=\"noopener\">ShortPixel Image Optimizer<\/a>. This specific feature from W3 Total Cache also&nbsp;interferes with normal WordPress functions like WP-Cron, preventing scheduled posts from getting published.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>We have received some reports where the bulk optimization process wasn&#8217;t behaving as it should. For example, it would start at 11%, then would skip directly to 100%. Then, in 20 seconds or so, again it would show 11% optimization and again would skip to 100%. For cases like this one, you should take a [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","template":"","meta":{"footnotes":""},"doc_category":[37],"glossaries":[],"doc_tag":[],"class_list":["post-893","docs","type-docs","status-publish","hentry","doc_category-shortpixel-image-optimizer"],"blocksy_meta":[],"year_month":"2026-04","word_count":93,"total_views":"3011","reactions":{"happy":"0","normal":"0","sad":"0"},"author_info":{"name":"admin","author_nicename":"admin_mdli53m5","author_url":"https:\/\/kb.shortpixel.com\/author\/admin_mdli53m5\/"},"doc_category_info":[{"term_name":"ShortPixel Image Optimizer","term_url":"https:\/\/kb.shortpixel.com\/knowledge-base\/category\/shortpixel-image-optimizer\/"}],"doc_tag_info":[],"knowledge_base_info":[],"knowledge_base_slug":[],"_links":{"self":[{"href":"https:\/\/kb.shortpixel.com\/wp-json\/wp\/v2\/docs\/893","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kb.shortpixel.com\/wp-json\/wp\/v2\/docs"}],"about":[{"href":"https:\/\/kb.shortpixel.com\/wp-json\/wp\/v2\/types\/docs"}],"author":[{"embeddable":true,"href":"https:\/\/kb.shortpixel.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/kb.shortpixel.com\/wp-json\/wp\/v2\/comments?post=893"}],"version-history":[{"count":1,"href":"https:\/\/kb.shortpixel.com\/wp-json\/wp\/v2\/docs\/893\/revisions"}],"predecessor-version":[{"id":1449,"href":"https:\/\/kb.shortpixel.com\/wp-json\/wp\/v2\/docs\/893\/revisions\/1449"}],"wp:attachment":[{"href":"https:\/\/kb.shortpixel.com\/wp-json\/wp\/v2\/media?parent=893"}],"wp:term":[{"taxonomy":"doc_category","embeddable":true,"href":"https:\/\/kb.shortpixel.com\/wp-json\/wp\/v2\/doc_category?post=893"},{"taxonomy":"glossaries","embeddable":true,"href":"https:\/\/kb.shortpixel.com\/wp-json\/wp\/v2\/glossaries?post=893"},{"taxonomy":"doc_tag","embeddable":true,"href":"https:\/\/kb.shortpixel.com\/wp-json\/wp\/v2\/doc_tag?post=893"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}