Impossible apply filter matching just one Colum

[zampino]

When there's just one row matching a specific column value

1. it's pretty hard to click on it if other values span much more rows
2. hovering on the single category doesn't show the value behind it (it just says 1 unique value)
3. once clicked, the table becomes empty and doesn't show the single row

In the images below there are 3 categories with ~3700, 120 and 1 value respectively.