diff --git a/api/core/llm_generator/llm_generator.py b/api/core/llm_generator/llm_generator.py
index 1c3909047..de871d351 100644
--- a/api/core/llm_generator/llm_generator.py
+++ b/api/core/llm_generator/llm_generator.py
@@ -572,5 +572,7 @@ class LLMGenerator:
             error = str(e)
             return {"error": f"Failed to generate code. Error: {error}"}
         except Exception as e:
-            logger.exception("Failed to invoke LLM model, model: " + json.dumps(model_config.get("name")), exc_info=e)
+            logger.exception(
+                "Failed to invoke LLM model, model: %s", json.dumps(model_config.get("name")), exc_info=True
+            )
             return {"error": f"An unexpected error occurred: {str(e)}"}
diff --git a/api/core/workflow/nodes/loop/loop_node.py b/api/core/workflow/nodes/loop/loop_node.py
index 3e52a3218..5561150dc 100644
--- a/api/core/workflow/nodes/loop/loop_node.py
+++ b/api/core/workflow/nodes/loop/loop_node.py
@@ -524,7 +524,9 @@ class LoopNode(BaseNode):
     @staticmethod
     def _get_segment_for_constant(var_type: SegmentType, original_value: Any) -> Segment:
         """Get the appropriate segment type for a constant value."""
-        if var_type in [
+        if not var_type.is_array_type() or var_type == SegmentType.BOOLEAN:
+            value = original_value
+        elif var_type in [
             SegmentType.ARRAY_NUMBER,
             SegmentType.ARRAY_OBJECT,
             SegmentType.ARRAY_STRING,
@@ -534,8 +536,6 @@ class LoopNode(BaseNode):
             else:
                 logger.warning("unexpected value for LoopNode, value_type=%s, value=%s", original_value, var_type)
                 value = []
-        elif var_type == SegmentType.ARRAY_BOOLEAN:
-            value = original_value
         else:
             raise AssertionError("this statement should be unreachable.")
         try: