**Steps to replicate the issue** (include links if applicable):
* Visit any Special:Notifications
* [https://en.wikipedia.org/w/index.php?title=Yakima_County,_Washington&oldid=prev&diff=1117085879 This Notification] was the most recent when I first experienced this bug. This may have caused a parse error. However I don't see anything unusual about it, and the bug continues after it is no longer on the page and the bug affects all wikis I have tested.
*
**What happens?**:
Most Notifications are not displayed. Which Notifications are displayed and not displayed appears to be random however the output is stable across reloads. The output changes upon receiving a new Notification.
**What should have happened instead?**:
Normal display of Notifications.
**Software version** (skip for WMF-hosted wikis like Wikipedia):
**Other information** (browser name/version, screenshots, etc.):