Beastrite/Behead: Stolen Rare Modifiers Disappear When Killing Non‑Rare Enemies

When using Einhars Beastrite or Behead I/II, the support gem correctly grants two stolen modifiers after killing a rare monster with a supported strike skill. However, these modifiers are immediately removed before their duration expires if I kill a non‑rare enemy with the same supported skill.

This causes the stolen modifiers to be effectively unusable, as they cannot be maintained even for a few seconds during normal combat.

This behaviour still occurs in the current version 0.4c.