What steps will reproduce the problem?

1. Fight Queen Azshara (any difficulty)
2. Enable Countdown on Arcane Detonation
3. Doesn't count down.

What version of BigWigs are you using? (Stating 'latest' is not useful)

Latest.

Do you have an error log of what happened?

no

Any additional information? (example: WoW language if not English) (Attach screenshots here if available, do not link externally)

There is a bar indicating when it will be cast, and that will always play a countdown (until she starts the cast).

If you mean a countdown for the duration of the cast, then please be clear in your request.

There is now a cast bar that will trigger the countdown, in addition to the cooldown.
Incase the cooldown is wrong, please provide logs and/or where it is off.