If the variations were enabled before, it might have been cached. If the search cache is enabled, please disable it and see if it works then.
Also, if you have other cache plugins (like w3tc or super cache) you should try to empty the cache of those plugins as well. Let me know if it worked.
If it's not hepling, then please link me to the page where it's happening, and I will take a look at the output.Best,
If you like my products, don't forget to rate them on codecanyon :)