I have never seen anyone un-upvote their own post before on this platform (viewing from voyager at least), most of my comments are initiated as pre-upvoted by myself, the author.

I’m thinking either you did undo the auto-upvote, or the other possibility is that it came with zero either way. I might have to start also de-voting my own posts that I am not enthused by if that is what you have done here.

(I’m still on Reddit mode where there might be some kind of running total for my profile, but I never bothered keeping track or angling for extra votes over there much either, it just cracks me up how much the little sorting algorithm metrics mean to some of us even when we might not be willing to admit or even recognize it sometimes)