It happens whenever you dodge roll immediately after a certain attack within a 3 part autoattack chain. I’ve had instances of this with ranged weapons (Such as Ranger shortbow) but I’ve had no luck reproducing this on training dummies.
Here’s a list of what I’ve been able to consistently reproduce. I’ve considered making a compilation video of all the classes and which autoattacks bug and how to bug them, but I’ve had my head in the clouds hoping this would’ve been fixed a long time ago, but I digress. Anyway, here’s a write-up.
For the following, if you dodge roll immediately after the listed attack, your dodge roll will fail:
Warrior
Sword 2nd attack
Axe 1st attack
Mace 1st and 2nd attack
Greatsword 2nd attack
Hammer 1st and 2nd attack
Thief
Dagger 1st and 2nd attack
Note 1st attack only seems to occur if you quickly dodge roll after the first attack of the two attacks that are included in Double Strike
Sword 1st and 2nd attack
Mesmer
Sword 1st and 2nd attack
Scepter 1st and 2nd attack
Elementalist
Conjure Lightning Hammer 1st and 2nd attack
Ranger
Sword 1st attack (So if you’re not content with being rooted in place for the next 2 attacks, you can always bug your own dodgeroll on the first attack, harharhar)
Greatsword 2nd attack
Guardian
Hammer 1st and 2nd attack
Note This can be exploited to shorten the cast time of Symbol of Protection
Greatsword 2nd attack
Sword 1st and 2nd attack
Mace 1st and 2nd attack
Note This can be exploited to shorten the cast time of Faithful Strike
Special Note For Guardians, this can be exploited to use Selfless Daring as an AOE heal without leaving melee range. It’s also been referred to as “Ninja Skipping” when used to this end. Nothing major, but worth noting if anyone wants to exploit this dodge roll bug for healing.
Engineer
Toolkit 2nd attack
Necromancer
Dagger 1st and 2nd attack
Note 1st attack only seems to occur if you quickly dodge roll after the first attack of the two attacks that are included in Necrotic Slash
Additional Notes
This can be reproduced with either hotkey dodge roll, or double tapping. This is not limited to the hotkey.
Turning off the autoattack on your 3-part attack chain does reduce the likelihood of it occurring but it does not eliminate it. If you continue pressing to attack and try to dodge, you can still bug your own dodge roll.
I imagine there are more than what I listed, but this is what I have currently.