Select fields can't be filtered to empty/null values

When applying a filter based on a select/picklist field, you cannot deselect all options—despite the necessary UI elements (:white_check_mark:, :x:) showing up. Might actually be a bug? Regardless, the ability to filter tasks that have an empty/null field value would be a really valuable feature for our team.

Here’s what happens currently, when you try to remove the first/only selected value:


+1 This is a blocker for us too. It’s especially frustrating because there’s no way to assign a default for a custom field, which means it’s plainly impossible to filter to tasks with an unset value for a custom field.