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On live, there's a small icon at the top of the screen that shows how much time is remaining until the world PVP towers can be captured in the Terokkar bone wastes. On test, this icon doesn't show up. I can't find any UI toggle to make it show up.
))

Thanks for the report Silme. <-- Spelled correctly this time.

It looks like this is only occurring with Display World PVP Objectives set to DYNAMIC. It's a bug and it's being investigated, but for now if you need to see the objective info you can set Display World PVP Objectives to ALWAYS.