TA blossom bugged
As an engineer, I had this same issue with my pistol, elixir gun, and flamethrower. Flamethrower has some more issues with attacking most objects in general though. This was actually the deciding factor for me to change to a grenade/bomb build. I really hope they fix the glitchy misses when it comes to objects you can attack.
Same with the 1 of a staff-using mesmer.
I had to switch from a staff to a GS on a Mesmer.
As an elementalist with staff, I had the same issue, which makes the gauntlet run back through the blossoms, hard after dying (which happened frequently, with the constant carpet of AoE poison)…. So, you try, they are obstructed or out of range, you start to run then they AoE you… die, try again! Not very pleasant, I would like you to look at that dungeon a bit…
Sovrein