Hello There,
Thanks for writing in! That should not be the case. If you are using the latest version, all elements will be displayed both the classic ones and the v2 elements. You can choose what elements to display in Cornerstone by going to X > Cornerstone > Content Builder Elements or Pro > Settings > Content Builder Elements.
By the way, maybe you are just having a caching issue. Do you have any caching plugins installed or maybe using CloudFlare? Please make sure to clear your site cache first before testing your site. To assist you with this issue, we’ll first need you to provide us with your URL. This is to ensure that we can provide you with a tailored answer to your situation.
Thank you.