I'm seeing an equal number of classes in the Columns Classes list as in the Styles list in the editor toolbar.
In your screenshot above, you appear to have typed something into the Classes list ("box-brackground"), which will trigger the list filter function. If nothing matches the typed in text, then nothing is shown in the list, but the typed in class will still be applied.
The reason that some classes are not shown in the Classes or Styles lists is that the selector value is too complex, and only single class selector values are included, eg: "some_class"
.some_class is included but not "some_class"
.some .some_class
The box-background class selector fits this criteria as it is .box-background .wf-column in your stylesheet. If you add an empty value above this in your stylesheet of .box-background {} then it will be included, eg:
.box-background {}
.box-background .wf-column {
align-items: center;
background-color: #141747;
display: flex;
flex-direction: column;
justify-content: center;
margin-bottom: 1rem;
padding: 2rem;
text-align: center;
}
Ryan Demmer
Lead Developer / CEO / CTO
Just because you're not paranoid doesn't mean everybody isn't out to get you.