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From time to time, my Review Button will show a number of reviews to consider, yet when I click on the button fewer (always fewer, never more) reviews are shown? Sometimes the number resets to 0, sometimes the number increases, but the reviews in the queue are less and are different to reviews done just previously.
Looking at the related questions, the examples were either there were no edits or there is a persistence in the number of edits in the queue. Neither seem to be the same as my case where the number changes, but there is nothing in the queue, or the number remains the same, but there are different reviews in the queue. Coincidence in the latter seems possible but highly unlikely.
This also seems to happen in the middle of the night EST.
Is this an update problem or am I missing something else I should be doing?