Guild Wars 2

I was trying out a build idea, given the new boon duration stat, for might stacking on my druid, and I noticed that boon duration affects the tooltip duration for frost spirit’s might pulse (also affects other spirits as well).

But anyway, this is what I was noticing
In the PvP lobby, running minstrel’s amulet and the 20% boon duration trait in beastmastery, the tooltip stated that frost spirit would give me over 5 seconds of 3xMight every 3 seconds.
I placed my Frost spirit, it started pulsing out 3 stacks of might, but the duration was not increased. I did have permanent 3 stacks of might, but the duration was only 3 seconds and there was no overlap (as would be expected given the extended duration).

Other notes
1. I can’t be entirely sure, but I also placed a stone spirit, and it ‘appeared’ to be giving me the extended pulse-protection duration, though it is such a small duration I can’t be sure.
2. I don’t currently have any boon duration enhancing gear on my in PvE, but using the 20% boon duration trait, I placed my frost spirit (in my home instance, if that is relevant?), and the tooltip duration was 3 1/2 seconds. However, the expected result would be 3 stacks of might with a brief period of 6 stacks during the overlap between applied might stacks every 3 seconds. I only received permanent 3 might stacks with no 6-stack overlap, suggesting that it was not being affected by boon duration.
3. I am a level 80 male norn ranger, running Beastmastery, Nature Magic, and a varied third trait line (normally Druid or Marksmanship). I’m not sure if this bug is with the tooltip or the spirit, but I thought I would mention it