I had a couple of users that I was trying to see when they last logged in (would prefer not to mention in a public manner) and when those created a blank section where the information would usually appear in a list format, I then tried searching for my own ID in the UserList. Got the same result.
However, when I tried after making the first post in this report, it seemed to be functioning as intended. Which makes it the same sporadic issue like we had in Gen2 of the board (the one immediately prior to this version), just without a specific error message showing up.
The issue showed up while using Exploder7...