Many of the so-called flameouts are actaually an engine surge and brief loss of parameters which may be recovereable by crew action. While such an event is an abnormal occurence it is not always associated with permanet damage but can be associated with a bird ingestion without damage , inlet disturbances or even temporary thermal distortion within the engine.
Numerous cases of engines being restarted after these so-called flameouts including those pesky volcanic ash ingestions.