Mine

//at L2PetInstance.java line 734
//adding the stopHpMpRegeneration() bellow the stopFeed() should do the job ^^
//(too lazy to generate a patch for this small thing)

	public synchronized void unSummon (L2PcInstance owner)
	{
		stopFeed();
		stopHpMpRegeneration();
		super.unSummon(owner);
	}