Platform: Windows 7
ISP: Kabelplus
Type of Internet Connection: CATV
Internet Connection Speed: 300Mbps
Date & Time: Nov. 3, 2021 21:50 CET
Frequency: Always
Character Name: Tylas
Race: ElvaanM
World: Ragnarok
Main Job: Bard, Lv.99
Support Job: Ninja
Area and Coordinates: all zones of Dynamis Divergence and Odyssey: Sheol
Party or Solo: Alliance with 9 members
NPC Name: None
Monster Name: None
Steps:
  1. Enter any zone of Dynamis Divergence or Odyssey: Sheol.
  2. The game starts to lag while inside these zones, with the following symptoms:
  3. The receive indicator top right jumps to a value around R3000 and stays there while inside the zone.
  4. Monsters and players teleport around, dead monsters do not despawn, macros randomly don't work, battle animations randomly skip, etc...
  5. When leaving the zone, the lag disappears and the game behaves normally again.

This has been an ongoing issue ever since the DynamisD RP bar UI element has been introduced years ago. The lag varies on some days from 1 second which is mostly playable to 3-5 seconds which makes playing a pain. The size of the party does not seem to affect the lag, it is the same with small groups or a full alliance.
The symptoms are very similar to the heavy Odyssey: Gaol lag that has already been fixed and caused by too much traffic from the server to the client (according to official posts by SE).