Bug in the child filter - it doesn't work with advanced filters off

[funjul...@gmail.com]

With the following hierarchy:

folder

    animals (text tag "x")

        cats (text tag "y")

        dogs

    colors

        blue

        green

If I set child filter "text tag contains 'y'" nothing changes. The dogs are still there even though they don't meet the condition. "colors" is still there even though it has children and the children do not meet the condition.

Why does the filter not work?

But if I first add an advanced filter "text tag contains 'x'" I get

folder

    animals

and then if I show children I get:

folder

    animals

        cats

        dogs

and if I then add a child filter "text tag contains 'y'" it correctly filters out the dogs:

folder

    animals

        cats

Why does the child filter only work with the advanced filter on?