Click on the person

icon in the header. You have it selected in the screenshot 1, but that resource has no defined label. Where a label is not defined, TBC will display QNames or URIs.
Please use rdfs:label for classes, shapes, properties and, in general, any resources that are not instances of skos:Concept.
Note that performance of TBC will become more sluggish when you switch to the label display mode. This is because to work with labels in a performant ways, specialized label indexes for auto-complete, search, etc. are required. This is available in EDG (which is optimized for working with human oriented names), but not in TBC.