Fields with static values not excluded

I’m using the plugin for Google Shopping feeds and adding two static values (condition, set to “new,” and identifier_exists, set to “no”). I also have filters set up to exclude items that have the price set to 0 or the weight set to 0.

The items that are filtered out still appear in the feed, but with all the values missing except the two static ones, i.e.:

<item><g:identifier_exists>no</g:identifier_exists><g:condition>new</g:condition></item>

I’ve been using the plugin for a few months with no issue, so I assume it’s related to a recent update? I haven’t been able to find a workaround yet.