Uncheck "Include All Values When Empty" in the quick filter config.
Thanks - I should have seen that! It's great when there is a simple answer.
I have this table which has around 4 billion records. And, weirdly, it doesn't work on this table. Even if I uncheck "Include all values", it gives me everything.
I have checked a couple of other tables in the same DB and it works. Any idea why this might happen?