Our community uses “Make new topics wikis by default” across categories. We set min trust to edit wiki post as TL0, as well as min trust to tag topics to TL0. Previously, this allowed anyone in the community to add tags to topics created by others, and it appeared to work well (although I believe previously we had the TLs set to the defaults and decided to lower them). We have noticed that this function is no longer working—when a user attempts to add a tag via the “Edit wiki” feature, it shows up in the change log and gives the user a “wiki editor” badge (if they didn’t have one already) but doesn’t actually add the tag to the topic. Editing the text of the topic via the “Edit wiki” feature still works fine.
Any ideas what could be causing this?