After update to version 2.3.0 all empty columns are disappear in the Frontend!!!
Turn it back, please!

You have conceived a good thing - do not display the wrapper with empty content. But this approach should be applied only to widgets, but not in any case not to columns! Because empty columns are often used as a design element to indent left or right or between elements.

In general, this update has a lot of problems - for example, the parameter "Caption" = "none" does not work for the "Image" element: an empty tag "figcaption" appears in Frontend anyway.