The cause for the reversed fainter rainbow is usually just one more reflection inside the water droplet, so it could be just the other effect on top of that. It looks like a reflection rainbow from the way it splits near the base, and if you look carefully at images of those, there's usually a very faint copy of the whole thing visible (with reversed colours). The one above looks very bright, there may have been some image processing or longer exposure.
Reflection Rainbows
Re: Atmospheric optical phenomena
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