If conjure cookies backfires, you get a clot debuff for 15 minutes. When you get a wrath cookie, it refreshes the clot debuff back to the FULL 15 minutes. It should probably only add a couple minutes of clot, or set the clot to 2 minutes or whatever only if the current backfire-related clot is less than 2 minutes.
Even if this is just an oversight, it makes wrath cookies quite risky to click on for those 15 minutes. If you want to leave it in for balance, or this was even intended from the start, that's fine. Just wanted to make sure you were aware.