Like title says, after an enemy player or npc fails a cast or you succesfully interrupt a cast, it won't show anything below nameplate even if the option Time to Hold is set up.
It only shows when HD Nameplates option is disabled but you lose the ability to see non target castbars.
HD nameplates enabled:

HD nameplates disabled:

Like title says, after an enemy player or npc fails a cast or you succesfully interrupt a cast, it won't show anything below nameplate even if the option Time to Hold is set up.
It only shows when HD Nameplates option is disabled but you lose the ability to see non target castbars.
HD nameplates enabled:


HD nameplates disabled: