Issues

• [Reasoning Engine] New agent deployment consistently fails on 1st attempt with "failed to start and cannot serve traffic", but immediate retry succeeds

  api: vertex-ai
  googleapis/python-aiplatform#7166 · Filter by author Ganeshvenkatesanofficial opened on Sep 25, 2026
  2

• [prediction] fastapi<=0.124.4 cap blocks patched Starlette (CVE-2026-48710 / BadHost, CISA KEV)

  api: vertex-ai
  googleapis/python-aiplatform#7164 · Filter by author abarone-btf opened on Sep 24, 2026

• [Agent Engines] _wrap_async_stream_query_operation blocks asyncio event loop due to synchronous gRPC iteration

  api: vertex-ai
  googleapis/python-aiplatform#7136 · Filter by author steffanianigro opened on Sep 8, 2026
  3

  

• Protobuf 7.35.1+ support

  api: vertex-ai
  googleapis/python-aiplatform#7132 · Filter by author racinmat opened on Sep 3, 2026

• AgentEngineConfig.agent_framework Literal rejects "a2a" — out of sync with _SUPPORTED_AGENT_FRAMEWORKS and the GA A2A template

  api: vertex-ai
  googleapis/python-aiplatform#7097 · Filter by author vincentventalon opened on Aug 25, 2026

• rag.ask_contexts() cannot succeed: backend returns UNIMPLEMENTED on v1 and a generic INVALID_ARGUMENT on v1beta1. Is AskContexts allowlisted?

  api: vertex-ai
  googleapis/python-aiplatform#7091 · Filter by author arunpshankar opened on Aug 22, 2026
  1

• Shipped: vertexai-openeval-adapter — EvalPort import/export for vertexai.evaluation results

  api: vertex-ai
  googleapis/python-aiplatform#7078 · Filter by author adhabnr-ux opened on Aug 16, 2026

• CustomContainerTrainingJob.run drops max_wait_duration=0 instead of requesting indefinite DWS wait

  api: vertex-ai
  googleapis/python-aiplatform#7067 · Filter by author someshfengade opened on Aug 12, 2026
  1

• MetadataStores error

  api: vertex-ai
  googleapis/python-aiplatform#7020 · Filter by author CongaJAMM opened on Jul 24, 2026

• ADK async_stream_query doesn't capture error

  api: vertex-ai
  googleapis/python-aiplatform#7001 · Filter by author eakertFacet opened on Jul 16, 2026
  1

  

• evals run_inference (local ADK agent): strips multimodal prompt parts (inline_data) before Runner.run_async

  api: vertex-ai
  googleapis/python-aiplatform#6976 · Filter by author davidkitdave opened on Jul 10, 2026
  

• The interactions interface is incompatible with the Vertex AI Express mode

  api: vertex-ai
  googleapis/python-aiplatform#6966 · Filter by author MR-pofeng opened on Jul 8, 2026

• A2aAgent builds agent-card url from default region (us-central1), ignoring GOOGLE_CLOUD_AGENT_ENGINE_LOCATION

  api: vertex-ai
  googleapis/python-aiplatform#6877 · Filter by author qingvincentyin opened on Jun 11, 2026

• evals: AgentConfig.from_agent raises AttributeError for workflow / non-LlmAgent root agents (no 'tools' field)

  api: vertex-ai
  googleapis/python-aiplatform#6865 · Filter by author eliasecchig opened on Jun 9, 2026
  1

• Vertex AI Agent Engine: reasoning engine with secret-backed env vars (secret_env) deploys but has zero running instances

  api: vertex-ai
  googleapis/python-aiplatform#6863 · Filter by author itaykz opened on Jun 9, 2026
  1

  

• response_evaluation_score (COHERENCE) fails with INVALID_ARGUMENT: Error parsing JSON in all regions — vertexai 1.153.1

  api: vertex-ai
  googleapis/python-aiplatform#6853 · Filter by author Danigm-dev opened on Jun 4, 2026

• [bug] client.evals.create_evaluation_run(agent=<reasoningEngine>) fails for A2A engines — hardcodes stream_query() on agent_engine that only exposes on_message_send

  api: vertex-ai
  googleapis/python-aiplatform#6837 · Filter by author Abeansits opened on May 28, 2026
  

• Eu multi-region not compatible with init

  api: vertex-ai
  googleapis/python-aiplatform#6822 · Filter by author lvalladares opened on May 21, 2026

• Per-request _force_flush_otel() in ADK template blocks streaming responses

  api: vertex-ai
  googleapis/python-aiplatform#6807 · Filter by author yshimojo opened on May 18, 2026

• Support custom metadata labels for partner models on Vertex AI

  api: vertex-ai
  googleapis/python-aiplatform#6793 · Filter by author victorwang-sayari opened on May 14, 2026

• evals: ConversationTurn rejects extra fields from run_inference API response and missing turn_index

  api: vertex-ai
  googleapis/python-aiplatform#6785 · Filter by author tottenjordan opened on May 13, 2026

• CreateReasoningEngine fails with code 13 after deleting previous resource (Dockerfile/image_spec path, us-central1)

  api: vertex-ai
  googleapis/python-aiplatform#6754 · Filter by author trossy1 opened on May 8, 2026
  

• tests.system.vertexai.test_reasoning_engines.TestReasoningEngines: test_langgraph_template failed

  api: vertex-aiflakybot: flakyflakybot: issuepriority: p1type: bug
  googleapis/python-aiplatform#6753 · Filter by author flaky-bot opened on May 7, 2026
  3

• tests.system.vertexai.test_reasoning_engines.TestReasoningEngines: test_ag2_template failed

  api: vertex-aiflakybot: flakyflakybot: issuepriority: p1type: bug
  googleapis/python-aiplatform#6749 · Filter by author flaky-bot opened on May 7, 2026
  2

• Vertex AI Agent Engine sandbox :execute returning 404 NOT_FOUND in us-central1

  api: vertex-ai
  googleapis/python-aiplatform#6706 · Filter by author arryon opened on Apr 28, 2026