Point taken Kengineer. Probably depends on how well you know the aircraft. Is it an electrical failure on say a cessna with little chance of the flaps moving on their own accord, or could it be a mechanical fault with the chance of an uncommanded flap retraction?
Either way, I think I would do some fault diagnosis and handling tests at altitude before an immediate return as the last thing you want would be an unexpected , uncommanded flap retraction at 50 ft on the approach!