Work opens the wrong page
Check the navigation URL. The default Work route is /search/label/Project?max-results=12.
A project does not appear
Confirm the post is published and carries the exact label Project.
A filter is missing
Filters are built from meaningful labels on the Project cards currently available to the archive. Add the same discipline label to relevant Project posts and refresh.
Too many similar filters
Standardize spelling. For example, choose either “Web Design” or “Web design” and use it consistently rather than creating variants.
Project / Featured appears as a filter
Those are reserved labels and should be excluded by the theme. If you see one, confirm the label itself has not been modified with extra spaces or different wording.