WordPress Expert for eCommerce Site Fixes

I run kshomedecor.com.my on WordPress + WooCommerce and I’m seeing two recurring problems: • Products sometimes refuse to render on first load. A manual refresh or navigating to another page makes them appear, so something in the query, cache, or JS is failing intermittently... (Budget: $10 - $15 USD, Jobs: CSS, HTML, MySQL, PHP, Web Development, Website Optimization, WooCommerce, WordPress)