Had one in a Twin Squirrel during a vehicle pursuit on a very windy day...cops lost sight of the car and I saw it out of the corner of my eye, fastest way for them to get the camera back onto it was to hover downwind, so the aircraft was twitchy in yaw already.
Slightly larger twitch and heard the interference of the igniters over the intercom. Looked in and the auto relight was on, and the number two engine guages were all returning to normal.
Nothing found by the engineers, conclusion was a big gust had blown out the flame...auto relight's a great thing.