godmoney.6025

They have confirmed it as a bug and are currently investigating. https://en-forum.guildwars2.com/discussion/comment/1390109#Comment_1390109

As a thief main myself, I realize how broken thief actually is when I start roaming on other classes (non-stealth, medium mobility classes). Not the damage per sé, but the fact that you do not have to commit to ANY fight, even the fights you initiated. You can just use your many escape tools and stealth to infinitely reset if the fight isn't in your favor. This is unhealthy game design, but unfortunately most of thief's toolkit and balance has been done around its mobility and stealth and is not something that can be changed easily (even if the devs actually cared enough to do something about it). Unpopular opinion - stealth as a whole has been implemented in an unhealthy way in GW2 - access to stealth should be limited at best whilst in combat. And whilst Anet has implemented certain revealing mechanics to try and remedy this - they add counters to counters in the form of removing revealed on Deadeye elite skill.

If you get dismounted by a player using his own damage spike skills (e.g. Ranger Rapid Fire) then you should have an advantage, because his main damage skill is now on cooldown. Just engage and apply pressure.