Buttons - colvis column selector not working?

Doctor

I have an issue where I have tried to use a column selector (in this case, ':not(.classname)') for the colvis Buttons extension but it does nothing. However, I use the exact same column selector for the export options and it works fine.

Not working:
{extend: 'colvis', columns: ':not(.classname)'}

Working:
{extend: 'excel', exportOptions: {columns: ':not(.classname)'}}

Unfortunately it means I have to revert to having an array of column indexes to pick which columns show in the pop-up, which is not as tidy!

Is there a difference between the column selector implementation on these two extensions?

Doctor

Here's an example showing the issue. Note that it does work if I use a simple HTML DOM example, so it could be due to the class name being added after the initialisation.

https://jsfiddle.net/f7jnfbk2/

Doctor

Does anyone know why this does not work? Is it because the CSS class is being set in the column definitions, which works with export but not colvis??