This just happened to me in 6.2 vanilla, For me a large ship was trying to drop off wares to a build storage in the Frontier Edge sector, and it got perma stuck. I had to reload a save to fix it. Luckily I had set autosave to occur roughly every 10 or so minutes. In the time between these two saves I was trying to order the nearby Large Transport ships to pick up cargo with cargo drones that had dropped out of the Station Build storage for some reason, and then ordered them to put it back into the build storage. The Nearby Medium cargo ship had been set on repeat order to collect drops, and then 'sell' them to the nearby station's cargo.
I have a save from just before it gets stuck, and a save for right after it gets stuck.
It is the ship named "Large Tradeship Main IV" in the Frontier Edge sector.
'Large Tradeship Main III' gets in the way of it docking with the build storage and they glitch into each other for a little bit, not sure if this is relevant to the bug or not.
Auto save 1 is just before it gets stuck: https://www.dropbox.com/scl/fi/71nfiz6e ... 7wbmn&dl=0
And Auto save 2 is just after it gets stuck: https://www.dropbox.com/scl/fi/x8txkd4e ... crwwf&dl=0
Here is the quicksave where the ships start to pile up a little bit and I first noticed it was bugged. (If it helps): https://www.dropbox.com/scl/fi/r5zzd39w ... pla7f&dl=0
I hope this helps devs track down one of the causes of this issue.
