If the problem is still there after deactivating AO (and emptying your Quick Cache cache), then the problem is due to something else.
Regarding JS-issues such as the one you describe; you can either just disable JS optimization or start troubleshooting as described in the FAQ (you can try with "force JS into head" and maybe "look for JS only in head" first, but you might need to exclude e.g. jquery and other specific JS-files from optimizatoin, add-to-cart.min.js comes to mind).
Hope this helps,
frank