[Coenxai]

I wasn't aware Titanium supported a rested state?

void Client::CalcRestState() {

	// This method calculates rest state HP and mana regeneration.
	// The client must have been out of combat for RuleI(Character, RestRegenTimeToActivate) seconds,
	// must be sitting down, and must not have any detrimental spells affecting them.
	//
	if(!RuleI(Character, RestRegenPercent))
		return;

	RestRegenHP = RestRegenMana = RestRegenEndurance = 0;

	if(AggroCount || !IsSitting())
		return;

	if(!rest_timer.Check(false))
		return;

	uint32 buff_count = GetMaxTotalSlots();
	for (unsigned int j = 0; j < buff_count; j++) {
		if(buffs[j].spellid != SPELL_UNKNOWN) {
			if(IsDetrimentalSpell(buffs[j].spellid) && (buffs[j].ticsremaining > 0))
				if(!DetrimentalSpellAllowsRest(buffs[j].spellid))
					return;
		}
	}

	RestRegenHP = (GetMaxHP() * RuleI(Character, RestRegenPercent) / 100);

	RestRegenMana = (GetMaxMana() * RuleI(Character, RestRegenPercent) / 100);

	if(RuleB(Character, RestRegenEndurance))
		RestRegenEndurance = (GetMaxEndurance() * RuleI(Character, RestRegenPercent) / 100);
}

Looks and works fine for me on Underfoot. Make sure you're using the appropriate rule set for the zone you're in.