I’ve noticed this mostly from Quentin’s posts, but some other people from that instance posted here and their posts had 0 as score. You can tell it’s not because downvotes, otherwise the downvotes count would show up.
Is it normal? Is it a bug? Or are OPs removing their “auto-upvote” to their posts on purpose?
I can say the same about you. This seems to be because of different instances rather than instance-specific thing.