Reply To: That the in stock and out stock is not changing.

Hello,

I have tested the link you provided and its working fine on my end. Please let the first variation loaded completely then click the other variation to check.

Video for Clarification: https://jumpshare.com/v/hXXIVYJ2JrLMc0I8Aj8U

Please disable server caching, clear browser cache and check back.

Best Regards.