So today, after having beaten the game once and taking a break from my second game, I decided to try and wrap up some loose ends I forgot about before Ukaizo. However, upon entering and leaving ANY area back out to the main map (I have tested this after the initial encounter, it is any area), the game takes a moment to freeze upon loading in. No matter if I leave out onto the boat or an island, I am immediately forced into the pre-Ukaizo ship battle text sequence between the other factions and the Guardian. Reloading the autosave made upon immediately entering into the main map doesn't fix the issue. I don't even have any option to leave back out of the text sequence. Also, the dialogue choices do not contain my crew member names during this, and instead are blank. Following this, I can however fight the Guardian and continue through Ukaizo without issue. I should probably also add that this only started to happen AFTER I downloaded the Rum Runners Pack and Beard and Hair Pack, and that I first encountered this bug after recruiting Mirke. Not that I could see any reason why they'd be causing this, just adding as many details as possible. To be more specific, about a month ago, I reloaded my pre-Endgame save on my first character in order to recruit Mirke. I then left said character at Fort Deadlight to wait for the first expansion, and continued playing on my second character. Multiple weeks later, I hopped on said character to change some of my party members hair styles to ones from the Beard and Hair Pack, and then quit out immediately without triggering any sort of area transition. At the time, I did not encounter the bug because I did not leave out to the main map during either session. Jump to now, where I come back to do some quests I didn't know about at the time. Reloading the pre-Endgame save before recruiting Mirke leads to the same result upon entering and leaving any area out to the main map.
Here is the link to the Dropbox containing a save before the bug occurs, a save after, a completed game save before any of the packs were downloaded (just in case), my system specs, the output log, and a screenshot of the missing names. All in that order.