# April 2026

> April 2026 release notes for Maestro in Automation Cloud.

## April 30, 2026

### Query Expansion Multiple for Data Fabric

Data Fabric queries now support the `qem:` (Query Expansion Multiple) prefix in addition to the existing `qes:` (Query Expansion Single) prefix. Queries using `qem:` return all matching records as an array of up to 1,000 items, enabling workflows to fan out over multiple Data Fabric records in a single step. Queries using `qes:` continue to return a single record.

Additionally, `qes:` now returns an explicit error when the query matches more than one record, and returns an empty result when no match is found, instead of failing the workflow.

For more information, see [Data Fabric operations in Maestro](https://docs.uipath.com/data-service/automation-cloud/latest/user-guide/data-fabric-operations).

### Instance throttling indicator

Maestro now shows a warning indicator when a workflow instance is being throttled due to high activity volume:

- **Instances table**: A ⚠ warning icon appears next to the instance status. Hovering shows the tooltip: *Instance is throttled due to high activity volume.*
- **Instance details page**: A warning banner appears at the top of the page while the instance is running: *This instance is being throttled due to high activity volume. Execution continues at reduced speed.*

The indicator updates in near real-time and disappears automatically once throttling lifts. Throttling affects execution speed only — your workflow continues to run and produces the same results.

For more information, see [Instance throttling](https://docs.uipath.com/maestro/automation-cloud/latest/user-guide/instance-throttling).

### Human-in-the-loop Quick Form schema registration

Quick Form HITL tasks now register their schema with Orchestrator before task creation using `ITaskSchemasClient.CreateSchemaAsync`. Schema registration is idempotent — if the schema already exists (HTTP 409), it is treated as success and task creation proceeds normally. `TaskCreateRequest` now uses the native `TaskSchemaKey` (GUID) and `Type = QuickFormTask` properties from the v26 client, replacing the previous `AdditionalProperties` stub. A new error code `HitlTaskSchemaRegistrationFailed` (170042) is returned if schema registration fails.