Hello,

Sorry for the delay.

Most likely some of the plugins conflict and influence the product search.

Please deactivate all the plugins except these ones and check:

Contact Form 7
Mailchimp for WordPress
Safe SVG
Slider Revolution
WooCommerce
WPBakery Page Builder
XTEMOS Post Types plugin

If the problem has gone, activate the plugins one by one, checking the issue to detect which one causes the problem.

Best Regards