The #activitypub plugin for Wordpress is still not ready for primetime, IMO. When you add an image to your Wordpress Media Library, internally that's an attachment post, and the plugin appears to be ignoring that, and making a post out of it anyway. I just added a few dozen images to my library and they all showed up in my Mastodon feed as separate postings! Sorry, but that's crap.
@pfefferle #activitypubplugin #wordpress_activitypub_plugin
@japipes then you might have to check your settings! There is a section where you can decide what post types you want to federate. If you deactivate attachments, it will no longer publish media uploads!
@japipes and I would not call it „crap“, because it is a requested feature and (as already mentioned) you can deactivate it!