How to add tablepress table into custom field

Hello,

Thank you for this awesome plugin.

I use tablepress plugin to add product specifications, and then create a custom text field (product_specs_50hz), and paster the tablepress table short code to this field, like this: [table id=1 /], and try to render the table in the template using:
{@product_specs_50hz}

But it doesn’t render on the front end, I have tried to use rich text field for this short code, it failed again.

Wondering what I need to do to make this work?

Thanks
Brandon