Crumbs is not showing parent of taxonomy term
After spending more time than I wanted to to dealing with this—exploring solutions and Googling seemingly forever—I came across this post on the official Drupal site titled “Crumbs not working” and specifically this answer from ‘donquixote’ which states:


  
  are these system paths or node aliases? If they are node aliases, do you have the "path" plugin enabled? (*)
  


Okay, so that seems like an idea. So I went into the Crumbs settings area under “Structure > Crumbs” and dragged the path setting—which describes itself as “Chop off the last fragment of the path alias, consider the result as the parent path.”—from “Disabled by default” to the second position of “Enabled” (see attached screenshot), hit “Save configuration” and… et voilà… It works! Parent and child taxonomy terms are being rendered in the breadcrumb path as expected.