possible incompatibility with woocommerce

I’ve since deactivated Boost from our production site, and thus can’t provide many more details. But we were having issues with Boost and Woocommerce, getting an “Unable to fix malformed JSON” error in checkout.min.js in several of the latest woocommerce versions.

Practically, this was creating an error when proceeding to checkout, that said “SyntaxError: Unexpected end of JSON input”

I suspect boost’s JS deferring was breaking something here but couldn’t look much further and don’t have a wordpress account for our dev site.