diff --git a/hwe/sammo/Event/Action/RaiseInvader.php b/hwe/sammo/Event/Action/RaiseInvader.php
index 31124777..2c545500 100644
--- a/hwe/sammo/Event/Action/RaiseInvader.php
+++ b/hwe/sammo/Event/Action/RaiseInvader.php
@@ -100,6 +100,17 @@ class RaiseInvader extends \sammo\Event\Action
     }
 
     public function run(array $env)
+    {
+        $previousIgnoreUserAbort = ignore_user_abort(true);
+        try {
+            return $this->runToCompletion($env);
+        }
+        finally {
+            ignore_user_abort($previousIgnoreUserAbort !== 0);
+        }
+    }
+
+    private function runToCompletion(array $env)
     {
         $db = DB::db();
 
@@ -196,6 +207,7 @@ class RaiseInvader extends \sammo\Event\Action
         ], true);
 
         $invaderNationIDList = [];
+        $env = GeneralBuilder::prepareEnvironment($env);
         refreshNationStaticInfo();
         foreach ($cities as $cityObj) {
             if ($cityObj->level != 4) {
diff --git a/hwe/sammo/Scenario/GeneralBuilder.php b/hwe/sammo/Scenario/GeneralBuilder.php
index 498152bb..89112e35 100644
--- a/hwe/sammo/Scenario/GeneralBuilder.php
+++ b/hwe/sammo/Scenario/GeneralBuilder.php
@@ -539,11 +539,8 @@ class GeneralBuilder{
         return $this->death;
     }
 
-    public function build($env){
-        //scenario에 life==1인 경우 수명 제한이 없어지는 모양.
-
-
-
+    public static function prepareEnvironment(array $env): array
+    {
         if(!key_exists('stored_icons', $env)){
             try{
                 $text = \file_get_contents(\sammo\ServConfig::getSharedIconPath('../hook/list.json?1'));
@@ -556,6 +553,16 @@ class GeneralBuilder{
             $env['stored_icons'] = $storedIcons;
         }
 
+        return $env;
+    }
+
+    public function build($env){
+        //scenario에 life==1인 경우 수명 제한이 없어지는 모양.
+
+
+
+        $env = static::prepareEnvironment($env);
+
         $isFictionMode = (Util::array_get($env['fiction'], 0)!=0);
 
         $year = $env['year'];
diff --git a/tests/ScenarioGeneralBuilderSpecialTest.php b/tests/ScenarioGeneralBuilderSpecialTest.php
index fe37ca8e..58f6e36f 100644
--- a/tests/ScenarioGeneralBuilderSpecialTest.php
+++ b/tests/ScenarioGeneralBuilderSpecialTest.php
@@ -18,6 +18,16 @@ require_once __DIR__ . '/../hwe/sammo/Scenario/GeneralBuilder.php';
 
 final class ScenarioGeneralBuilderSpecialTest extends TestCase
 {
+    public function testPreparedStoredIconsAreReusedWithoutChangingTheEnvironment(): void
+    {
+        $environment = [
+            'stored_icons' => ['.' => ['default.jpg']],
+            'icon_path' => '.',
+        ];
+
+        self::assertSame($environment, GeneralBuilder::prepareEnvironment($environment));
+    }
+
     public function testAsiaPossessionScenarioWarSpecialsUseWarSlot(): void
     {
         $scenario = json_decode(