I have this too, I figure it’s just a visual / cache related bug. I don’t bother reupvoting, if I come back later or stop and restart the app it’s there.
It even happens with the same post, like if you upvote from the feed and then open the post it doesn’t show as upvoted.
bookmark cancels upvote
Does anyone else experience this? When I upvote a post and then bookmark it, the upvote disappears. I then have to redo the upvote.