Core/Unit: don't use damage immunity to calculate hit result for the whole spell. Should be used only for damage

src/server/game/Spells/Spell.cpp

@@ -2547,7 +2547,7 @@ SpellMissInfo Spell::DoSpellHitOnUnit(Unit* unit, uint32 effectMask, bool scaleA
         return SPELL_MISS_EVADE;
 
     // For delayed spells immunity may be applied between missile launch and hit - check immunity for that case
-    if (m_spellInfo->Speed && (unit->IsImmunedToDamage(m_spellInfo) || unit->IsImmunedToSpell(m_spellInfo)))
+    if (m_spellInfo->Speed && unit->IsImmunedToSpell(m_spellInfo))
         return SPELL_MISS_IMMUNE;
 
     // disable effects to which unit is immune