I suspect that this is unrelated to you, you can try repeating the same test with a friend. I think that fb (via their pixel, or via exchanging data w/ G) has

I suspect that this is unrelated to you, you can try repeating the same test with a friend. I think that fb (via their pixel, or via exchanging data w/ G) has the info that the specific ad has been clicked in that location/area, at that time, and possibly they also have some info about the user = you. This makes the ad "hot", and probably boosts it in fb's ranking. When you refresh your newsfeed, that ad matches your profile, is particularly hot, and naturally gets shown to you. As I was mentioning, you can try with a friend, or you can try going to a completely unrelated ad based on your interests.