As to my understanding, the FMS logic does not activate the missed approach unless the TOGA button is pressed OR the missed approach is activated on the CDU.
As this approach requires a level turn for the go-around, the latter would be used.
IMHO that means unless the missed approach is activated, the sequencing continues after the MAPt, sequencing to the landing runway by default.
So I suppose it should be possible to enter a "heading", "track" or even discontinuity leg after the MAPt that would result in the A/C continuing straight ahead (or at least not "jerking" towards the runway) when doing nothing at the MAPt.
I am not trying to fly the VPT using the FMS, just keeping the FMS from turning where it shouldn't turn.