Original Data Display on chart after filtering (DC.js)

I'm trying to display original data on my DC.js chart (similar to this) once filtered by using a "fake group".

I followed the steps in this post, and haven't had luck. I'm wondering if it's because I'm using reductio?

Also, maybe it's because I'm using key/value accessor functions??:

.keyAccessor((d) => {
    return d.key;
})
.valueAccessor((d) => {
    return d.value.avg;
}),

Here's the stackblitz minimal implementation, interested to hear any insight!

It was in fact a reductio "problem" as it creates a more complicated group object

e.g.

key: foo
value: {
  avg: bar,
  sum: baz,
  etc.
}

so the "deep copy" from the linked post

  function static_copy_group(group) {
      var all = group.all().map(kv => ({key: kv.key, value: kv.value}));
      return {
          all: function() {
              return all;
          }
      }
  }

is in fact still referencing. Fixed by using the clone library instead