fluke fix and tweak (#17652)

code/modules/organs/subtypes/parasite.dm

@@ -439,7 +439,7 @@
 	if (!owner)
 		return
 
-	if(prob(10))
+	if(prob(4))
 		owner.adjustNutritionLoss(10)
 
 	if(stage >= 2) //after ~5 minutes
@@ -490,7 +490,11 @@
 	if (!owner)
 		return
 
-	if(prob(10))
+	if(BP_IS_ROBOTIC(heart))
+		recession = 10
+		return
+
+	if(prob(4))
 		owner.adjustNutritionLoss(10)
 
 	if(stage >= 2) //after ~7.5 minutes

html/changelogs/kermit-fluke-fix.yml

@@ -0,0 +1,7 @@
+author: kermit
+
+delete-after: True
+
+changes:
+  - bugfix: "Heart parasites can no longer eat metal hearts."
+  - tweak: "Reduces speed of parasite hunger drain."