So many teleport abilities in this game are buggy. Blink, shadow step, KSP all have and continue to drop people through the world and in the case of KSP kill the rogue due to game play mechanics.
Blizz tried to address this with the glyph that returns you to your previous location but that doesn't always work and even so just the act of teleporting behind the boss can get a rogue killed.
Simple fix: change the glyph to no longer teleport the rogue. This allows the CD to be used any time you're able to attack the boss (which it should be) and prevents a gimmick part of the ability from killing the rogue. Really the only dsp CD out there that kills a person if used at the wrong time which is a bad mechanic. Can keep it unglyphed for pvp so that you can still stick onto a target but can glyph it for pve so that you don't kill yourself and can still use your dps cooldown.