Upvoted comments show correctly.

The same is for downvoted.

Do you have "show read posts" deactivated in the Lemmy Websettings? Or maybe it's called "hide read posts".

Anyways, if Lemmy hides those posts by default they are also hidden in many lists where you'd want to see them. The solution is to let read posts be shown by Lemmy but activating Summit's option to hide them. Then it should work as expected.

Yes I had that deactivated. It works now, thanks for the Tip!
It might be nice if Summit could notice this and guide the user, I for myself didn't know there was a difference between Summit and Lemmy "Hide read posts"

Thanks for reporting this issue. This is actually a bug with the client despite you having the "hide read" web setting turned on. It's just that having that setting on surfaces the bug. I will fix it in the next release.