Roland Johansen
Deity
Sorry about this bug.
The patch will simply remove game speed scaling from those two espionage missions. They will always result in 6 unhappy/unhealthy for 6 turns.
Good to hear that a patch is in the making and that it will address this problem.
Doesn't the cost of this mission scale with game speed (I really don't know)? If the cost does scale with game speed, then the effect should also scale. If the cost doesn't scale with game speed, then it would probably still cost you more spies to repeatedly perform the mission in slower game speeds but that isn't a big problem as production of units is relatively cheap at slower game speeds.