Recently, I used all of my daily 40 upvotes on an SE site (Android SE). However, the achievements dialog only showed one of the badges - not two.
Here's a screenshot.
In the screenshot, the Badges section of the website shows that I have earned the Suffrage badge a minute ago, but the achievements dialog doesn't show this - it only shows the Vox Populi badge (and the notification for that badge took about 5 minutes to show up, even with changing pages and looking at the dialog).
Both the badges should be shown in the notifications when I get them, not one of them 5 minutes later.