meta fields for variable products are not printed anymore

Hi,
I’ve been seeing a new issue since this weekend. I use Bulky to manage additional product fields that I print on packing slips (e.g., picking locations). Everything used to work fine, but I’m now seeing a regression: the meta fields no longer print for variable products, and their thumbnail image is missing as well. It still works correctly for simple products. I recently updated Bulky, so I’m wondering if the update could be the cause—and, more importantly, how to fix it.
Many thanks in advance for your help.