Hi Danny, that helped a lot to know that it worked ok in v2.

I tracked it down to a selection change for the Flow command - for surface to surface Flow it needs to pick individual faces for the base surface and target surface and since at that stage it knows that it only wants faces the selection goes into a kind of "auto drill-in" mode so that faces are directly targeted with a single click without needing to select the top level object first.

That same thing is kicking in for extrude and causing this regression. Now that I know the particular thing that caused it I should be able to fix it up. Thanks for reporting it.

- Michael