Conditional formatting disappears when "All Values" pivot table prompt

I have a column with conditional formatting "set background to red when value < 1000".

This works as expected in a pivot table view, and works when a field is added as a pivot table prompt as well.

However, when I set the pivot table prompt to "Totals Before" or "Totals After" and select the "All Values" option, the conditional formatting disappears.

Is this behaving as designed?