Not sure if this is a bug or the way the skill was intended but I have noticed on several occasions while in Lions Arch that while in plague form fighting aetherblades, I would get booted from plague form & the skill timer would start counting down as if it went the full duration.
I have not had a chance yet to look and see what skill exactly is removing my plague form but would like to know if this is a bug or not…if it is, I will try to gather more information on it.