So there isn't actually any bug here, and it takes some explanation of how the review queues work to get to why it's not a bug.
The review page is not a good indicator of whether your suggested edit is still pending.
The number of tasks displayed there is a live count of how many you, personally can review. That count does not include anything you own or tasks you've already reviewed. So for you, it should display 0 if there are no other available tasks, because you can't review your own edit.
Most review queues reserve tasks when opened.
When a user views the task for the first time, they start a 5-minute grace period where that task is specifically reserved to them to complete. This prevents tasks being assigned out to a bunch of users and leaving other users with an already-completed task because they weren't quite as fast. This reservation simply prevents it being given out to someone else who visits the review queue until the time expires, but others can still access it at any time with a direct link.
So users here who are just visiting the review page and seeing that it's not popping up when they try to review - it shouldn't, because people stopping by keep reserving it out to themselves and preventing it dropping as a normal task for anyone else.
This task just hadn't been reviewed yet.
One person did review it. But five people also skipped it. That's consistent with the number of people who have been active at all in the review queue over the past few days. You just got unlucky in that other reviewers didn't feel comfortable making a decision on that edit.