We have discussed the problems with the "suggested edits" review queue for a while here.
Some people make extremely minor edits in quick succession.
Often it is people who make the same style of edit to a lot of posts - add or remove one specific tag to a question, only removing "Thank you" from posts, or only removing a specific keyword from the title.
Unfortunately, these extremely minor edits are often approved. The people who make these edit suggestions are then rewarded with +2 rep, and the serial approvers are closer to a badge. And since the edits were approved, the "edit ban" does not kick in.
I suggest that we do not allow people to suggest edits to different posts within 5 minutes.
This should discourage "serial minor edits", while encouraging people to take some time making proper edits.