Upfront Tabs Text Not Saving

I'm in a very frustrating loop with the Upfront Tabs (another feature which looks great but doesn't work properly).

The text in the tabs is not saving no matter how many times I change and update.
I'm pressing the enter key after entering the text and waiting
Have tried putting a new Tab and same thing happens.

You can see it in the open page
http://comunify.cc/crossfit/cardio/

Please advice.