Guild Wars 2

Trait is supposed to grant retaliation to phantasms.
Does not work if you are traited into phantasmal fury.

Alone the retaliation buff wears off after a few seconds and doesn’t refresh

I just checked and you are right. The fury buff does not refresh either.
For me the buff stays on the phantasms for about 8 seconds and does not refresh.
It is impossible to have both retaliation and fury on the same phantasm.
(even if, by changing the trait, it is possible to have two phantasms with a different buff on each one)

I can confirm this bug. I put 20 points in Dueling and 30 points in Inspiration and only a one time fury buff appears on phantasms. Before I worked with another build, so i can’t say anything about how long this bug exists or if this combination even never worked. All i may assume is that this is a systematical error or bug. Please fix this asap