Hey there!
Really love this mod and especially the Courier port feature, that is, until today when I went to my main planet and found my ship storage empty...
I've retracked my save files one by one to see when was last time I had my spare ships still in there and found that it was right before setting up couriers for forges. I have not clicked in the options that I want them to transport ONLY cargo, as I assumed it would by "everything" only take items that fit into that industrial supply storage.
I have since tried to recreate this, and it happened again.
The ship leaves with Forge templates AND all my ships in storage but delivers ONLY Forge templates. The ships are nowhere to be found, I have checked almost every storage possible.
Now, just as I was writing this post, I decided to try retracing my steps back and see if something helps correct this bug (well, probably I can call it that?), hoping my huge collection of ships did not get lost
and I'm so glad it worked!
Solution: So, I've sent another shipment with ALL items and ALL ships option, but this time I've tried sending it back to my main planet... and although ships were not logged into shipping log (where you can see what items are being transported), they arrived back safely at the base.
So, as a suggestion, maybe you should remove the option of automatic assignment of "all ships" when it comes to Industrial Supply store? As ships do not fit in there anyway. Maybe it will save somebody a mini heart attack like I had
I can only assume they were kept in Industrial supply store but kept hidden.
P.S. Luckily, they did not charge me for transporting over 1k DP fleet back and forth... Although it WOULD'VE helped me notice it