diff --git a/qdrant_client/conversions/conversion.py b/qdrant_client/conversions/conversion.py
index 2c64cb2c7..897672ea3 100644
--- a/qdrant_client/conversions/conversion.py
+++ b/qdrant_client/conversions/conversion.py
@@ -239,7 +239,7 @@ def convert_collection_info(cls, model: grpc.CollectionInfo) -> rest.CollectionI
             payload_schema=cls.convert_payload_schema(model.payload_schema),
             segments_count=model.segments_count,
             status=cls.convert_collection_status(model.status),
-            points_count=model.points_count,
+            points_count=model.points_count if model.HasField("points_count") else None,
             indexed_vectors_count=(
                 model.indexed_vectors_count if model.HasField("indexed_vectors_count") else None
             ),
@@ -498,7 +498,7 @@ def convert_collection_status(cls, model: grpc.CollectionStatus) -> rest.Collect
     @classmethod
     def convert_update_result(cls, model: grpc.UpdateResult) -> rest.UpdateResult:
         return rest.UpdateResult(
-            operation_id=model.operation_id,
+            operation_id=model.operation_id if model.HasField("operation_id") else None,
             status=cls.convert_update_status(model.status),
         )
 
diff --git a/tests/conversions/fixtures.py b/tests/conversions/fixtures.py
index 72a7648e1..f99a82453 100644
--- a/tests/conversions/fixtures.py
+++ b/tests/conversions/fixtures.py
@@ -945,6 +945,15 @@
     update_queue=grpc.UpdateQueueInfo(length=42),
 )
 
+# `points_count` is `optional` in the proto: the server omits it when the count is
+# not available, which must not be reported as an empty collection.
+collection_info_no_points_count = grpc.CollectionInfo(
+    status=collection_status,
+    optimizer_status=optimizer_status_error,
+    segments_count=6,
+    config=collection_config,
+)
+
 collection_info_red = grpc.CollectionInfo(
     status=collection_status_error,
     optimizer_status=optimizer_status_error,
@@ -1088,6 +1097,9 @@
 
 update_result_completed = grpc.UpdateResult(operation_id=201, status=update_status_completed)
 update_result_wait_timeout = grpc.UpdateResult(operation_id=201, status=update_status_wait_timeout)
+# `operation_id` is `optional` in the proto: the server omits it, e.g. when a
+# delete-by-filter matches nothing or when an update is clock-rejected.
+update_result_no_operation_id = grpc.UpdateResult(status=update_status_completed)
 
 delete_alias = grpc.DeleteAlias(alias_name="col3")
 
@@ -1882,6 +1894,7 @@
     "Filter": [filter_nested, filter_],
     "CollectionInfo": [
         collection_info,
+        collection_info_no_points_count,
         collection_info_ok,
         collection_info_red,
         collection_info_grey,
@@ -2116,7 +2129,12 @@
     "SearchMatrixOffsets": [search_matrix_offsets],
     "StrictModeConfig": [strict_mode_config, strict_mode_config_empty],
     "UpdateQueueInfo": [update_queue_info, update_queue_info_deferred],
-    "UpdateResult": [update_result, update_result_completed, update_result_wait_timeout],
+    "UpdateResult": [
+        update_result,
+        update_result_completed,
+        update_result_wait_timeout,
+        update_result_no_operation_id,
+    ],
     "UpdateMode": [update_mode_upsert, update_mode_insert_only, update_mode_update_only],
     "ReplicaState": [
         replica_state_active,
diff --git a/tests/conversions/test_validate_conversions.py b/tests/conversions/test_validate_conversions.py
index 0ee37d16a..d7c791ab6 100644
--- a/tests/conversions/test_validate_conversions.py
+++ b/tests/conversions/test_validate_conversions.py
@@ -670,3 +670,58 @@ def round_trip(prefix):
     grpc_params, recovered = round_trip(False)
     assert not grpc_params.HasField("prefix")
     assert recovered.prefix is None
+
+
+def test_convert_update_result_operation_id_presence():
+    from qdrant_client import grpc
+    from qdrant_client.conversions.conversion import GrpcToRest, RestToGrpc
+
+    # `optional uint64 operation_id` carries explicit presence: the server leaves it
+    # unset for updates that were not assigned a sequence number
+    absent = grpc.UpdateResult(status=grpc.UpdateStatus.Completed)
+    assert not absent.HasField("operation_id")
+    assert GrpcToRest.convert_update_result(absent).operation_id is None
+    assert not RestToGrpc.convert_update_result(GrpcToRest.convert_update_result(absent)).HasField(
+        "operation_id"
+    )
+
+    # a real operation id of 0 must stay distinguishable from "no operation id"
+    zero = grpc.UpdateResult(operation_id=0, status=grpc.UpdateStatus.Completed)
+    assert GrpcToRest.convert_update_result(zero).operation_id == 0
+    round_tripped = RestToGrpc.convert_update_result(GrpcToRest.convert_update_result(zero))
+    assert round_tripped.HasField("operation_id")
+    assert round_tripped.operation_id == 0
+
+
+def test_convert_collection_info_points_count_presence():
+    from qdrant_client import grpc
+    from qdrant_client.conversions.conversion import GrpcToRest, RestToGrpc
+
+    config = grpc.CollectionConfig(
+        params=grpc.CollectionParams(shard_number=1),
+        hnsw_config=grpc.HnswConfigDiff(m=16, ef_construct=100, full_scan_threshold=10000),
+        optimizer_config=grpc.OptimizersConfigDiff(default_segment_number=2),
+        wal_config=grpc.WalConfigDiff(wal_capacity_mb=32, wal_segments_ahead=0),
+    )
+
+    # `optional uint64 points_count` carries explicit presence: an absent count means
+    # "not available", which is distinct from a collection that holds zero points.
+    absent = grpc.CollectionInfo(
+        status=grpc.CollectionStatus.Green,
+        optimizer_status=grpc.OptimizerStatus(ok=True),
+        segments_count=1,
+        config=config,
+    )
+    assert not absent.HasField("points_count")
+    assert GrpcToRest.convert_collection_info(absent).points_count is None
+    assert not RestToGrpc.convert_collection_info(
+        GrpcToRest.convert_collection_info(absent)
+    ).HasField("points_count")
+
+    zero = grpc.CollectionInfo()
+    zero.CopyFrom(absent)
+    zero.points_count = 0
+    assert GrpcToRest.convert_collection_info(zero).points_count == 0
+    round_tripped = RestToGrpc.convert_collection_info(GrpcToRest.convert_collection_info(zero))
+    assert round_tripped.HasField("points_count")
+    assert round_tripped.points_count == 0