Invulnerability doesn't work

[IronLich86]

Hi everyone!
I am modifying the HellSmith monster in ZScript and the A_SetReflectiveInvulnerable function and the INVULNERABLE flag is not working at all, the monster continues to take damage. I don't know where the problem may be, but it is not normal.

Here part of the code

	Pain:
		SMT2 E 3 A_Pain;
		SMT2 E 5 A_Jump(128, 1);
		Goto See;
		SMT2 G 6 
		{
			A_FaceTarget();
			A_StartSound("monster/hamswg");
			bREFLECTIVE = true;
			bINVULNERABLE = true;
		}
		SMT2 H 6 A_FaceTarget;
		TNT1 A 0 A_SpawnProjectile("PentaLine1", 0, 0,-72,CMF_AIMDIRECTION);
		TNT1 A 0 A_SpawnProjectile("PentaLine1", 0, 0,-144,CMF_AIMDIRECTION);
		TNT1 A 0 A_SpawnProjectile("PentaLine1", 0, 0,-216,CMF_AIMDIRECTION);
		TNT1 A 0 A_SpawnProjectile("PentaLine1", 0, 0,-288,CMF_AIMDIRECTION);
		TNT1 A 0 A_SpawnProjectile("PentaLine1", 0, 0, 0,CMF_AIMDIRECTION);
		SMT2 I 1 A_StartSound("monster/hamflr");
//		SMT2 H 6 A_SmithPentaLine1();
		SMT2 IIIIIIIIII 7 HealThing(20);		// Total 200 hp
		SMT2 B 4
		{
			bREFLECTIVE = false;
			bINVULNERABLE = false;
		}
//		SMT2 B 0 A_UnSetReflectiveInvulnerable;
		Goto See;

I use Slade3 for coding and Ultimate GZDoom Builder for testing.

 

I appreciate any help.