I was working the Low Quality Post review queue, specifically this Question. I wanted to make an Edit to clean up an evident omission (that "spaces" are topological spaces), but I did not think this suffices to make the meaning clear.
So instead of doing the edit directly from the Review Queue, I drilled down to the underlying Question and did an edit there. My expectation was this would allow me to "skip" the over-lying review and give the OP additional time to clarify what the problem means.
However, the Review Queue instead told me "this item is no longer reviewable", so my strategy failed.
How can I make a useful Edit without either removing the item from the Review Queue or indicating that the post's quality is "good enough" for Math.SE?
Perhaps the lesson is not to try to make a slight improvement to LQ posts in review, until the OP has responded to Comments requesting clarification. However time spent reviewing and improving posts is at something of a premium, so I'd prefer to do what I can while the post is in front of me.