We have confirmed the following issue is occurring in "FINAL FANTASY XV Multiplayer Expansion: Comrades".
■Players' level up may not be reflected
In the multiplayer quest, if more than two players increase in level at the Campground (EXP tally screen) after the quest is cleared, only the first player to leave the Campground will see their level up reflected, and players who leave after that may not see their level increase reflected.
Even if the level increase is not reflected, any experience points (EXP) earned by players remain saved, and the level up will occur correctly the next time the multiplayer quest is played as long as the above conditions are not occurring.
We apologize for any inconvenience this may be causing.