We’ve had an answer on french forum.
Well they don’t say that much, but at least we got an answer :
Here’s the translation :
Hello,
Thank you for your message: we actually work on the analysis of the problem.
Thank you for your understanding.
Anyway nobody’s surprised, new update = new bugs, it’s a habit on GW2.
And for people who think they gonna give you loots as compensation, i just want to say…. stop dreaming
Please apologize if i did any mistakes.