Customers intermittently experience record save failures in model-driven apps where the error originates from a business rule executing as a real-time (sync) workflow via Microsoft.Crm.ObjectModel.SyncWorkflowExecutionPlugin.

The failure seems not like a logic error, for example:

• 'DynamicActivity': ... Compiler error(s) encountered processing expression "InputEntities("primaryEntity")". Type 'Entity' is not defined.
• 'DynamicActivity': ... Compiler error(s) encountered processing expression "New Object() { Microsoft.Xrm.Sdk.Workflow.WorkflowPropertyType.Boolean, "true" }". 'Xrm' is not a member of 'Microsoft'.

Returned as ErrorCode -2147220891 / 0x80040265, ApiExceptionMessageName: IsvAborted.

Observed behavior:

• Errors appear intermittently on save, on out-of-the-box business rules with no recent customization change.
• Disabling the affected business rule either resolves the save or shifts the same error to a different business rule, indicating the issue is in the shared compilation/type-resolution layer rather than any individual rule.
• Validating and recreating the business rules does not resolve it.
• The behavior self-recovers after several days with no customer-side action.

Business impact: Users are blocked from saving records in production, with no effective workaround other than disabling business rules.