"Don't Touch the Shiny" bug
This may or may not be helpful to you: http://wiki.guildwars2.com/wiki/Don%27t_touch_the_shiny
There are many things like this not working, including hearts that are extremely difficult to finish because the main things you are supposed to be doing aren’t working, ex: termite mounds and hylek guns.
I was told it was related to a recent bug fix about damaging inanimate objects, but I don’t know.
I did this without any problem roughly a week ago.
That’s not to say it hasn’t been broken in the mean time though.
The patches did it. With the feature patch, and some subsequent bug fixes, many things broke.