Quote Originally Posted by aabe View Post
It's not erased, it just doesn't show up on the target's debuffs.
Easiest way to confirm would just be to check for WF damage in a big raid where it's not showing up on the target, however on BRD if I apply WB + VB in a 24man and only one of the dots shows up, I still see +Venomous Bite +Windbite when I use iron jaws.

No, it won't be applied. I had Wildfire on a mob until 2s remained, and then it dropped due to too many debuffs, 2s later, no animation, no Wildfire! 5207! or whatever, no damage in chat log.