The new tool allowing the OP of a post to override community review on suggested edits to it doesn't take account of the fact that said OP may be suspended! Or rather, it does but only partially so: a suspended OP can press the "Reject" button on an edit that's already been approved, and this will show up both on the review item and in their activity history, but the edit doesn't actually get rolled back. This is what happened here, for example.
Technically this doesn't actually have any effect on the site - presumably the existing blocks preventing suspended users from making edits kick in after the review has been done - but it's still worrying that users are able to perform any activity on the site while suspended. Especially since one of the reasons for suspension is self-vandalism of one's own posts, and once a user is suspended there's nothing more that can be done to them to prevent them performing activities.