Not ignoring stated class?

I’m trying to use Hammy in conjunction with a theme that puts a slider inside of the same entry content class that Hammy will be applied to. This creates a conflict where the images in the slider simply won’t appear at all.

I have tried using Jquery to add an image class to the images in the slider. As far as I can tell from inspecting after the fact, the class is taking; however, when I turn Hammy on the same thing happens as if there were no class at all, with the images all replaced by Hammy’s <picture>. I did remember to add the class to the ignore list.

Help?

https://www.ads-software.com/extend/plugins/hammy/