The current default eA setup is such that GTB blocks Coma completely. Any inconsistency is due to server customization.
//Status that are blocked by Golden Thief Bug card or Wand of Hermod
if (status_isimmune(bl))
switch (type)
{
case SC_DECREASEAGI:
case SC_SILENCE:
case SC_COMA:
case SC_INCREASEAGI:
case SC_BLESSING:
case SC_SLOWPOISON:
case SC_IMPOSITIO:
case SC_AETERNA:
case SC_SUFFRAGIUM:
case SC_BENEDICTIO:
case SC_PROVIDENCE:
case SC_KYRIE:
case SC_ASSUMPTIO:
case SC_ANGELUS:
case SC_MAGNIFICAT:
case SC_GLORIA:
case SC_WINDWALK:
case SC_MAGICROD:
case SC_HALLUCINATION:
case SC_STONE:
case SC_QUAGMIRE:
case SC_SUITON:
return 0;
What is more interesting is that there has been recent reports/confirmations, that there's a small chance to self-inflict Coma on the user. Test were conducted using weapons which triggers Coma. In addition, the chances of triggering Coma is ten times higher on eA servers than on official servers (something eA developers need to address ASAP).