Bug with Restoration Druid talent "Control of the Dream"

I’m a Restoration Druid, and I’ve encountered a bug with the talent “Control of the Dream.” When selecting both “Control of the Dream” and “Dreamstate”, if the cooldown of “Convoke of Spirits” is less than 15 seconds and I use “Tranquility” to reduce the cooldown and make “Convoke of Spirits” usable, “Control of the Dream” does not activate during these 15 seconds.

Here’s my test:

  1. When the cooldown of “Convoke of Spirits” is at 15 seconds, I use “Tranquility”, and at this point, “Convoke of Spirits” becomes usable.
  2. After “Convoke of Spirits” remains idle for 10 seconds and then I use it, the cooldown of “Convoke of Spirits” is still 60 seconds, and “Control of the Dream” does not activate.
  3. However, if “Convoke of Spirits” remains idle for 20 seconds before I use it, “Control of the Dream” will activate at the 15-second mark, and the cooldown of “Convoke of Spirits” will be reduced to 55 seconds.