this is an interesting quirk...
I have a patch that I've made as a subpatch, with inlets and outlets, to be used inside of a bpatcher. This subpatch looks fairly nice on its own. Its signal flows nicely in edit mode, and the interface is clean in presentation mode.
The problem arises when I encapsulate the subpatch into a bpatcher. It seems that the subpatch remains outside of presentation mode no matter what I do.
So this is either a feature request or a bug fix, depending on how you look at it.
I would be thrilled if I could use the presentation mode layout of my subpatches.