RF455-106 Aggressive Monsters Ignore Vertical Distance When Detecting and Attacking Players

Aggressive monsters appear to ignore the player's vertical position when calculating detection and attack ranges. They can detect and initiate attacks against a player even when the player is positioned significantly higher than the monster.

The same issue appears to affect attack range validation, suggesting that distance checks may be performed using only the X and Y coordinates, without accounting for the vertical coordinate (height).

Actual Behavior: Aggressive monsters detect and target players who are far above them vertically. Monsters can initiate attacks against players despite the significant difference in elevation. Both target detection and attack range checks appear to use 2D distance calculations rather than full 3D distance calculations.

Expected Behavior: Monster detection and attack range calculations should account for the player's vertical position. Monsters should not detect or successfully attack players who are outside the valid 3D detection or attack range.