Ensures leftover candidates and pending antags are cleared after finalizing

code/game/antagonist/antagonist.dm

@@ -186,11 +186,16 @@
 	for(var/datum/mind/player in pending_antagonists)
 		pending_antagonists -= player
 		add_antagonist(player,0,0,1)
+	
+	reset_antag_selection()
 
-//Resets all pending_antagonists, clearing their special_role (and assigned_role if ANTAG_OVERRIDE_JOB is set)
-/datum/antagonist/proc/reset()
+//Resets the antag selection, clearing all pending_antagonists and their special_role 
+//(and assigned_role if ANTAG_OVERRIDE_JOB is set) as well as clearing the candidate list.
+//Existing antagonists are left untouched.
+/datum/antagonist/proc/reset_antag_selection()
 	for(var/datum/mind/player in pending_antagonists)
 		if(flags & ANTAG_OVERRIDE_JOB)
 			player.assigned_role = null
 		player.special_role = null
 	pending_antagonists.Cut()
+	candidates.Cut()

code/game/gamemodes/game_mode.dm

@@ -305,7 +305,7 @@ var/global/list/additional_antag_types = list()
 
 /datum/game_mode/proc/fail_setup()
 	for(var/datum/antagonist/antag in antag_templates)
-		antag.reset()
+		antag.reset_antag_selection()
 
 /datum/game_mode/proc/announce_ert_disabled()
 	if(!ert_disabled)

code/modules/mob/new_player/new_player.dm

@@ -289,7 +289,7 @@
 
 
 	proc/AttemptLateSpawn(rank,var/spawning_at)
-		if (src != usr)
+		if(src != usr)
 			return 0
 		if(!ticker || ticker.current_state != GAME_STATE_PLAYING)
 			usr << "\red The round is either not ready, or has already finished..."