Looks like WordPress core has a bug where get_image_tag() returns a different class than wp_get_attachment_image(). This shouldn't be a filter though, but patched in the plugin itself given the core spits it out.
Note to upstream: Without this patch, post thumbnails might not get properly sized (not sure they'll get properly sized post patch as I don't use this plugin yet). Even if they do get properly sized some parts of the code that are wasteful will get exercised to determine the srcset mappings.
Looks like WordPress core has a bug where
get_image_tag()returns a different class thanwp_get_attachment_image(). This shouldn't be a filter though, but patched in the plugin itself given the core spits it out.Note to upstream: Without this patch, post thumbnails might not get properly sized (not sure they'll get properly sized post patch as I don't use this plugin yet). Even if they do get properly sized some parts of the code that are wasteful will get exercised to determine the srcset mappings.