Solid layer on fast honeycomb

[prototyper]

I've a question about solid layers on fast honeycomb
Situation as below

will result in holes in the surface (red circles), I don't know a filament that can build corners in free space.

A quite simple solution could be to draw a outline around the solid parts (black line) where the filament can connect.
Yes, for sure, this will not solve all problems - lower right corner still won't be correct assuming the outline stops where I let the black line end.
But it could make things better.

So far I know, S3D doesn't support something like this.

Any idea how to solve ?