Emacs child frames don't trigger re-layout

[Cerebus]

Emacs child frames add a window but it's "part" of the parent window (i.e., it's in the same blue frame when using app expose). However, these windows don't trigger aerospace to re-layout.

> aerospace list-windows --workspace 2
25152 | Emacs | *scratch*  —  (97 × 52)
25293 | Emacs | *scratch*  —  (97 × 52)
25295 | Emacs | NΛNO sidebar

When in accordion layout, the child frame extends offscreen. Further, changing the layout (e.g., accordion & back) narrows the child frame from the right.