No, you cannot. What seems to work is to ALT TAB again.
They don't need to change anything but the code. We are talking about a bug in the game:
Sorry, in order to avoid this the devs should take that into serious consideration, not me, as any other game does.
Not related at all with party speed. It is ALT-TAB related bug.
Not exactly as there is no collision. My party "switches" to permanent follow mode for no reason, and keeps in follow mode until I exit the game and restart (reloading a save game without restarting doesn't fix it).
The list of fixes in the beta doesn't say anything about the conspiracy war party.
I understand that argument, but for some reason I think it could be really fun. At the end you always can have your fresh troops in reserve ready to smash a tired enemy or the opposite. Actually it could be a game difficulty option.