Verified this on 18.11. Didn't test on master. Confirmed it was not an issue in 18.05. To test: - enable tags - enter some tags on two different logins - log out and confirm that no tags are shown when not logged in - log in as each user and confirm each user can only see their own tags
Which exact versin of 18.11.x? See bug 22420 which is part of 18.11.06
I believe I ran into this on 18.11.03. Just had a look on an 18.11.06 site and it appears to be resolved. I'll go ahead and close this.