diff --git a/api/services/variable_truncator.py b/api/services/variable_truncator.py
index 00aa31650c2986..0d9b7cd2a90d29 100644
--- a/api/services/variable_truncator.py
+++ b/api/services/variable_truncator.py
@@ -292,6 +292,7 @@ def _truncate_array(self, value: list[object], target_size: int) -> _PartResult[
                 used_size += 1  # Account for comma
 
             if used_size > target_size:
+                truncated = True
                 break
 
             remaining_budget = target_size - used_size
@@ -301,7 +302,7 @@ def _truncate_array(self, value: list[object], target_size: int) -> _PartResult[
                 raise UnknownTypeError(f"got unknown type {type(item)} in array truncation")
             truncated_value.append(part_result.value)
             used_size += part_result.value_size
-            truncated = part_result.truncated
+            truncated = truncated or part_result.truncated
         return _PartResult(truncated_value, used_size, truncated)
 
     @classmethod