I'm also experiencing a related issue.
I have a process that runs unattended within windows server 2016 environment. The process clicks often during the whole time, but, only in the end occured to have some trouble with UIPI.
I think the issue is not in the user interface element, because if it were, i would receive the error message signalizing it.
This bug is already tracked? Couldn't find something that specific.
Problema ao executar a ação 'Click'. Clicar falhou (erro ao clicar)
Microsoft.Flow.RPA.Desktop.Modules.SDK.Extended.Exceptions.InternalActionException: Clicar falhou (erro ao clicar) ---> System.InvalidOperationException: Some simulated input commands were not sent successfully. The most common reason for this happening are the security features of Windows including User Interface Privacy Isolation (UIPI). Your application can only send commands to applications of the same or lower elevation. Similarly certain commands are restricted to Accessibility/UIAutomation applications. Refer to the project home page and the code samples for more information.
em WindowsInput.WindowsInputMessageDispatcher.DispatchInput(INPUT[] inputs) na /_/src/libs/H.InputSimulator/WindowsInputMessageDispatcher.cs:linha 37
em WindowsInput.MouseSimulator.MoveMouseToPositionOnVirtualDesktop(Double absoluteX, Double absoluteY) na /_/src/libs/H.InputSimulator/MouseSimulator.cs:linha 163
em Microsoft.Flow.RPA.Desktop.UIAutomation.DesktopCore.InputSimulator.MouseSimulatorProxyBase.MoveMouseToPosition(Point point)
em Microsoft.Flow.RPA.Desktop.UIAutomation.Runtime.AutomationRuntimes.UIAutomationRuntimeBase.ClickElementInWindow(IntPtr windowHandle, String selector, MouseClickTypeEnum clickType, RectangleEdgePointEnum elementRectangleEdgePoint, Int32 offsetX, Int32 offsetY)
em Microsoft.Flow.RPA.Desktop.UIAutomation.Runtime.LocalAutomationRuntime.ClickElementInWindow(UIRuntimeElement element, Int32 offsetX, Int32 offsetY, MouseClickTypeEnum clickType, RectangleEdgePointEnum elementRectangleSubsector)
--- Fim do rastreamento de pilha do local anterior onde a exceção foi gerada ---
em System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
em Microsoft.Flow.RPA.Desktop.UIAutomation.Runtime.Router.UIAutomationRuntimeRouter.Invoke(MethodInfo targetMethod, Object[] args)
--- Fim do rastreamento de pilha do local anterior onde a exceção foi gerada ---
em System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
em System.Reflection.DispatchProxyGenerator.Invoke(Object[] args)
em generatedProxy_2.ClickElementInWindow(UIRuntimeElement , Int32 , Int32 , MouseClickTypeEnum , RectangleEdgePointEnum )
--- Fim do rastreamento de pilha de exceção remota ---
em Microsoft.Flow.RPA.Desktop.Modules.UIAutomation.Common.Proxy.RemoteAutomationRuntimeProxy.Invoke(MethodInfo targetMethod, Object[] args)
--- Fim do rastreamento de pilha do local anterior onde a exceção foi gerada ---
em System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
em System.Reflection.DispatchProxyGenerator.Invoke(Object[] args)
em generatedProxy_2.ClickElementInWindow(UIRuntimeElement , Int32 , Int32 , MouseClickTypeEnum , RectangleEdgePointEnum )
em Microsoft.Flow.RPA.Desktop.Modules.UIAutomation.Actions.ClickElementInWindow.<Execute>b__25_1(IAutomationRuntimeProxy r, UIRuntimeElement e)
em Microsoft.Flow.RPA.Desktop.Modules.UIAutomation.Common.UIAutomationActionBase.PerformAutomation(Action`2 action, UIControl control, Boolean logAction)
em Microsoft.Flow.RPA.Desktop.Modules.UIAutomation.Actions.ClickElementInWindow.Execute(ActionContext context)
--- Fim do rastreamento de pilha de exceções internas ---
em Microsoft.Flow.RPA.Desktop.Modules.UIAutomation.Actions.ClickElementInWindow.Execute(ActionContext context)
em Microsoft.Flow.RPA.Desktop.Robin.Engine.Execution.ActionRunner.Run(IActionStatement statement, Dictionary`2 inputArguments, Dictionary`2 outputArguments)
