Bottom line: The timer between mission completion and cash-in should be longer than 8 days to align with the current war mechanism.
I was working the BGS for a minor faction. With ~18 mission completed, I just logged out before flying back and turning them in. The next day that faction went into the status of pending war. From my understanding, the influence for factions with pending war/civil war is already locked, so I waited until the war was won to cash in. Surprisingly, all the missions disappeared from the transaction tab the day after the war finished (about 8 days after completion). Support staff told me these missions simply expired on that morning, so it seems the current timer to cash-in is about 8 days. I suggest the timer be extended for at least a few days so that it doesn't work against those who do the most missions, i.e. the BGS players.
I was working the BGS for a minor faction. With ~18 mission completed, I just logged out before flying back and turning them in. The next day that faction went into the status of pending war. From my understanding, the influence for factions with pending war/civil war is already locked, so I waited until the war was won to cash in. Surprisingly, all the missions disappeared from the transaction tab the day after the war finished (about 8 days after completion). Support staff told me these missions simply expired on that morning, so it seems the current timer to cash-in is about 8 days. I suggest the timer be extended for at least a few days so that it doesn't work against those who do the most missions, i.e. the BGS players.