Ghost Ships - Disappearing Shipments - Two shipments to same port occasionally eats one of them?

At first I thought I might be going crazy, but this has now occurred three times, in a relatively short time span.

Notes:
- This example uses two different characters for sending shipments (because I was testing something). However that's not relevant to the bug, as the other two times it occurred I only had one character in the league.
- I think all 3x times I was using Port Te Onui. The previous times with Crimson Iron Bars, so type of bars irrelevant.
- Type of goods matching or mismatching is irrelevent.
- At no point did my Treasury run out of Gold.
- May be difficult to reproduce as I might have some other weird setup causing this and I don't follow standard setups.

Recreating steps from my notes and town:
0) I have Shipping Rank 7. Two ships. There were crew members idling on both ships from previous shipments.
1) Likely at this point I Selected Port on both ships, to Te Onui.
2) On my level 91 character, in Ship#1 I put 20 Verisium Bars and 1280 Thaumaturgic Dust.
3) On my level 91 character, in Ship#2 I put 300 Verisium Bars and 19200 Thaumaturgic Dust.
4) (Alternate moment I Selected Port. Likely irrelevant.)
5) I likely removed all crew from Ship#1 and Ship#2 here, to min-max them per shipment.
6) I added/removed crew to Ship#2 until fulfilling the shipment at exactly 0% risk without wasting higher rank crew. Crew Ranks 3 + 2 + 2 + 1.
7) I added/removed crew to Ship#1 until fulfilling the shipment at exactly 0% risk without wasting higher rank crew. Crew Ranks 6 + 5 + 4 + 2.
8) I Set Sail on Ship#1.
9) I logged onto my level 38 character, and Set Sail on Ship#2.

Again, logging between chars is not causing the bug. The previous times it occurred I did the above kind of thing, only on the level 91 character.

2 hours later I get one notification of shipment (I was logged in and playing the entire time). I waited a minute or two for the second notification, which never came. I thought it a bit odd, especially when checking in hideout seeing that both ships are in port. When I went to Kingsmarch, Ship#1 had Rewards waiting, and Ship#2 was at port as though it never Set Sail.

Looking at my resources, the 300 Verisium Bars from Ship#2 are gone, and no Rewards.

This bug has been unresolved for so long that all threads were automatically archived with replies disabled.