Found something weird.
I'm not sure if this is specific to this mod, or something else entirely. But since I've only ever encountered this at one Tiandong port I thought here would be a good place to start.
The port in question is Macau in Magec.
When trying to access the trade/commodities area, the market interaction music stutters briefly before stopping entirely and SS itself becomes entirely unresponsive to further input.
There is no fault written to the log.
Last few entries:
Spoiler
7967256 [Thread-4] INFO com.fs.starfarer.api.impl.campaign.events.TradeInfoUpdateEvent - Picking market updates
7968739 [Thread-10] INFO sound.O - Creating streaming player for music with id [TiandongMarketInteractionFriendly.ogg]
7968739 [Thread-10] INFO sound.H - Playing music with id [TiandongMarketInteractionFriendly.ogg]
I tried another new game and it worked fine with no problem.
But the new save has the following entries:
Spoiler
253918 [Thread-10] INFO sound.O - Creating streaming player for music with id [TiandongMarketInteractionNeutral.ogg]
253918 [Thread-10] INFO sound.H - Playing music with id [TiandongMarketInteractionNeutral.ogg]
253931 [Thread-8] INFO sound.F - Creating music buffer #2
259791 [Thread-4] INFO com.fs.starfarer.api.impl.campaign.events.TradeInfoUpdateEvent - Picking market updates
Which appears to be where it got stuck.
Note: Lack of buffering in the problem save.
No idea where this has come from, never seen it before.
Not a clue what to do other than avoid Macau.
I'm not even sure this is something that is specifically fixable, treat it as an "FYI - this thing happened".