1. play a class with "jump" skills, attacks that make you jump up and move your position, eg Hash
2. kill the "mage" mob and knockdown the mob pack

3. use a "jump" attack skill and land on the mobs in knockdown state
4. observe for 1 second how your character gets pushed in random directions for a small distance, looks like shivering
5. random result, but in 40% of such cases your character will fall through ground and die
6. in this picture: revive to see if your character gets teleported back up - NOPE
7. you are forced to use "traveler map" for teleportation or similar items

8. you lose buffs, grind time and maybe crystals

Bug exists since Ulukita was released

I suffered so many deaths because of this, look into my logs and give me compensation!