He [reviewed a suggested edit on his own post](https://stackoverflow.com/review/suggested-edits/3865139). Note that his name is highlighted in blue on the reviewers roll call:

![enter image description here][1]

If you look over [his review history](https://stackoverflow.com/users/1397504/nico?tab=activity&sort=reviews) you'll see that this was his 21st suggested edit review today.

The OP is always given a veto vote on suggested edits on his own posts, regardless of review queue limits.


  [1]: https://i.sstatic.net/xPBqn.png