Tokens for taxonomy term parents in Pathauto I am trying to find the correct tokens to use for a Pathauto pattern in Drupal 8.

In Drupal 7, I have a Pathauto module pattern that creates a URL alias with a node's term and parent term.

So if the node had a Term reference of Health -> Diet. The URL would be health/diet/node-title.

The pattern to generate this is [node:field-topic:0:parents:join-path]/[node:field-topic:0]/[node:title]

Note the :0 is because the Term reference field allows multiple values.
I just tested the tokens that I suggested in the comments with field_tags on articles and it works perfectly, no idea what your problem is, make sure you use the latest versions of pathauto and token.

Token: /articles/[node:field_tags:0:entity:parents:join-path]/[node:field_tags:0:entity]/[node:title]

Tag hierachy: A > B > C

Alias for an article tagged with C: /articles/a/b/c/pathauto-test