diff --git a/code/datums/achievements/_achievement_data.dm b/code/datums/achievements/_achievement_data.dm
index 2a000c15557..b6e2cf3f7a9 100644
--- a/code/datums/achievements/_achievement_data.dm
+++ b/code/datums/achievements/_achievement_data.dm
@@ -30,7 +30,7 @@
 
 /datum/achievement_data/proc/load_all_achievements()
 	set waitfor = FALSE
-	
+
 	var/list/kv = list()
 	var/datum/DBQuery/Query = SSdbcore.NewQuery("SELECT achievement_key,value FROM [format_table_name("achievements")] WHERE ckey = '[sanitizeSQL(owner_ckey)]'")
 	if(!Query.Execute())
@@ -61,6 +61,8 @@
 
 ///Unlocks an achievement of a specific type.
 /datum/achievement_data/proc/unlock(achievement_type, mob/user)
+	if(!SSachievements.achievements_enabled)
+		return
 	var/datum/award/A = SSachievements.awards[achievement_type]
 	get_data(achievement_type) //Get the current status first if necessary
 	if(istype(A, /datum/award/achievement))
@@ -75,6 +77,8 @@
 
 ///Resets an achievement to default values.
 /datum/achievement_data/proc/reset(achievement_type)
+	if(!SSachievements.achievements_enabled)
+		return
 	var/datum/award/A = SSachievements.awards[achievement_type]
 	get_data(achievement_type)
 	if(istype(A, /datum/award/achievement))
diff --git a/code/datums/status_effects/status_effect.dm b/code/datums/status_effects/status_effect.dm
index fbd3b2cc299..112d17c4e72 100644
--- a/code/datums/status_effects/status_effect.dm
+++ b/code/datums/status_effects/status_effect.dm
@@ -143,7 +143,7 @@
 	var/stacks = 0 //how many stacks are accumulated, also is # of stacks that target will have when first applied
 	var/delay_before_decay //deciseconds until ticks start occuring, which removes stacks (first stack will be removed at this time plus tick_interval)
 	tick_interval = 10 //deciseconds between decays once decay starts
-	var/stack_decay = 1 //how many stacks are lost per tick (decay trigger) 
+	var/stack_decay = 1 //how many stacks are lost per tick (decay trigger)
 	var/stack_threshold //special effects trigger when stacks reach this amount
 	var/max_stacks //stacks cannot exceed this amount
 	var/consumed_on_threshold = TRUE //if status should be removed once threshold is crossed
@@ -151,7 +151,7 @@
 	var/overlay_file
 	var/underlay_file
 	var/overlay_state // states in .dmi must be given a name followed by a number which corresponds to a number of stacks. put the state name without the number in these state vars
-	var/underlay_state // the number is concatonated onto the string based on the number of stacks to get the correct state name 
+	var/underlay_state // the number is concatonated onto the string based on the number of stacks to get the correct state name
 	var/mutable_appearance/status_overlay
 	var/mutable_appearance/status_underlay
 
@@ -194,6 +194,8 @@
 		if(stacks >= stack_threshold && !threshold_crossed) //threshold_crossed check prevents threshold effect from occuring if changing from above threshold to still above threshold
 			threshold_crossed = TRUE
 			on_threshold_cross()
+			if(consumed_on_threshold)
+				return
 		else if(stacks < stack_threshold && threshold_crossed)
 			threshold_crossed = FALSE //resets threshold effect if we fall below threshold so threshold effect can trigger again
 			on_threshold_drop()
@@ -205,13 +207,14 @@
 		owner.add_overlay(status_overlay)
 		owner.underlays += status_underlay
 	else
-		fadeout_effect() 
+		fadeout_effect()
 		qdel(src) //deletes status if stacks fall under one
 
 /datum/status_effect/stacking/on_creation(mob/living/new_owner, stacks_to_apply)
-	..()
-	src.add_stacks(stacks_to_apply)
-	
+	. = ..()
+	if(.)
+		add_stacks(stacks_to_apply)
+
 /datum/status_effect/stacking/on_apply()
 	if(!can_have_status())
 		return FALSE
diff --git a/code/modules/mob/living/carbon/life.dm b/code/modules/mob/living/carbon/life.dm
index 1783d370f0a..72200d457e6 100644
--- a/code/modules/mob/living/carbon/life.dm
+++ b/code/modules/mob/living/carbon/life.dm
@@ -333,7 +333,8 @@
 	if(stat != DEAD)
 		for(var/V in internal_organs)
 			var/obj/item/organ/O = V
-			O.on_life()
+			if(O.owner) // This exist mostly because reagent metabolization can cause organ reshuffling
+				O.on_life()
 	else
 		if(reagents.has_reagent(/datum/reagent/toxin/formaldehyde, 1)) // No organ decay if the body contains formaldehyde.
 			return
diff --git a/code/modules/research/nanites/nanite_programs/healing.dm b/code/modules/research/nanites/nanite_programs/healing.dm
index c0c6e0361d7..844d9809a9c 100644
--- a/code/modules/research/nanites/nanite_programs/healing.dm
+++ b/code/modules/research/nanites/nanite_programs/healing.dm
@@ -53,7 +53,7 @@
 	rogue_types = list(/datum/nanite_program/suffocating, /datum/nanite_program/necrotic)
 
 /datum/nanite_program/purging/check_conditions()
-	var/foreign_reagent = LAZYLEN(host_mob.reagents.reagent_list)
+	var/foreign_reagent = length(host_mob.reagents?.reagent_list)
 	if(!host_mob.getToxLoss() && !foreign_reagent)
 		return FALSE
 	return ..()