Huhu ,
I observed this now over some time now and wanted to report it . Many short time buffs cancel rogue´s Hide . For example HoT´s from various healers or self buffs from Rogues.
(Best observed infront of the last boss in Rofl when you want to skip the Guardian 
)
For example :
Gyazo
gyazo.com
It also does not appear to be a specific secondary class , as i tested on 4 subclasses and it happened everywhere
Greetings
