[TERA PC & Console] En Masse is closing, but TERA lives on! We will continue to support TERA PC (NA) and TERA Console until service is transferred. Stay tuned for more information.
[TERA Console] The Grotto of Lost Souls update (v85) is now live! Read the patch notes here: https://bit.ly/TERACon_v85
[TERA PC] The 64-bit update (v97) is now live. Check out all the changes delivered on August 11 here: https://bit.ly/tera64_patchnotes
[TERA PC & CONSOLE] Summerfest Part 2: The Beach Bash is on from August 11 until September 1! Participate in event activities to earn tokens redeemable for costumes, consumables, mounts, and more! Details: https://bit.ly/tera_sf20

Comments
On the other side, seems like you got trolled by the dungeon.
Didn't that also happen a lot in DS2 lmao
There goes your run count, lol. A few friends had that glitch where they fell off the map after Nightmare Imperator had died and that run didn't count for their 100th. They had to do one more for their titles.
Most of these issues are caused by client side prediction, which are unlikely show up when 99% of your core playerbase plays under 30ms.
Not saying it wont happen if you play at low ping, but most of time you'll synchronized faster than others playing at higher latency, allowing you to react and move to a safe spot.
Theres no fix for this, when you mix client side prediction with fast paced one shot mechanics that require precise positioning thats is what you get.
also a whole party could be on laptops and wifi for all i know. they could be using satellite internet too. the only thing that was mentioned in this thread was for entertainment and that is how broken the dungeon is. i don't happen to have a group that can run the dungeon nor do i have the gear to so i cannot compare.
That was funny.
I never fell off map and had to do one extra run too, same with SCHM. I'm not sure what exactly causes a run not to count towards an achievement, but it doesn't have to specifically be falling off the map.