fix

app/Http/Resources/API/ContainerDetailResource.php

@@ -42,7 +42,7 @@ class ContainerDetailResource extends JsonResource
             "email_subject"  => $this->email_subject,
             "doc_stage"  => $this->doc_stage,
             "doc_type"  => $this->doc_type,
-            "custom_fields" => $this->custom_fields ? json_decode($this->custom_fields) : [],
+            "custom_fields" => $this->custom_fields,
             "description"  => $content?->description ? (new \App\Services\File\ImageUrlService)->getImageUrl($content?->description) : "",
             "acl"  => $this->acl,
             "whitelist"  =>$whitelist,

app/Http/Resources/API/FileByObjectResource.php

@@ -38,7 +38,7 @@ class FileByObjectResource extends JsonResource
             'naming_rules' => $this->naming_rules,
             'doc_stage' => $this->doc_stage,
             'doc_type' => $this->doc_type,
-            "custom_fields" => $this->custom_fields ? json_decode($this->custom_fields) : [],
+            "custom_fields" => $this->custom_fields,
             'bim_file' => $this->bimFile ? new BimFileResource($this->bimFile) : null,
         ];
 

app/Http/Resources/API/TaskDetailResource.php

@@ -66,7 +66,7 @@ class TaskDetailResource extends JsonResource
             "review_by" => new UserProfileResource($this->reviewBy),
             "review_at" => $this->review_at,
             "created_by" => new UserProfileResource($this->createdBy),
-            "custom_fields" => $this->custom_fields ? json_decode($this->custom_fields) : [],
+            "custom_fields" => $this->custom_fields,
             "created_at" => (string)$this->created_at,
             "updated_at" => (string)$this->updated_at,
             "containers" => ContainerSimpleResource::collection($this->containers),