Timezone indicator missing at pipeline jobs listing, date tooltip

The timezone for our gitlab server is US/Eastern (EDT). I changed the gitlab.rb config to gitlab_rails['time_zone'] = 'US/Eastern'. When viewing the pipeline list the date column tooltip dicplays the absolute date and the timezone indicator.

When entering the job build list for the specific pipeline the date column tooltip displays the absolute date without the timezone indicator.

Possible relation with https://gitlab.com/gitlab-org/gitlab-ce/issues/60000