[Plugin: Woocommerce] Attributes losing dependency when more than 30 variations

I’m creating a product with many variations. Two of the attributes used in creating the variations are dependent. These are Manufacturer and Gun Model.

When a user chooses a Manufacturer, then only the Gun Models that are associated with that manufacturer should be shown in the next dropdown.

This works fine when I’ve added 30 or less variations to the product, but as soon as I add the 31st variation, the attributes lose their dependency and ALL gun models are shown in the Gun Model dropdown instead of only the ones associated with the manufacturer that was chosen.

Product with 30 variations:
https://dae.4b1.myftpupload.com/product/owb-holster-new/

Product with 31 variations:
https://dae.4b1.myftpupload.com/product/owb-holster-copy/