So during the Last Voyage of the USS Constitution quest I ran into an interesting bug... two of them actually. I'll list both here, just in case they affect each other.
So first off talking to Capt'n Ironsides and defending the USS Constitutions first attack. quest stage 170 and I did fire the cannons once quest stage 173 causes the battle music to continue to play...
Sometimes it plays forever.. some people have reported it to play even into the main menu... source:
https://gamefaqs.gamespot.com/boards/164593-fallout-4/73060334
But doing a Hard reset of your system seems to fix it.. sometimes you must do a hard reset a few times to make battle music stop....
At first I did not notice that the battle music was continuing forever so I did the rest of the Ironsides quests. fix the ship up. completing all the optional objectives and science checks. I also already had a power relay coil on hand.
On quest stage 800 "Defend the USS Constitution" after exiting conversation with Ironsides he says to defend the ship... But no Scavvers show up... after multiple reloads from a quick save and auto save. (to the top deck.) I had one Raider spawn... But unfortunately nothing changed. Lookout. (the mister handy.) killed him before I could talk to ironsides.
Now during this quest I did all the shortcut options (with Intelligence.). I killed the scavvers Mandy and her friends... after I snuck and stole the chip. which also even if undeteced you will still be caught and instantly attacked. And I also got caught stealing in the Hull by accident. one of the protectrons took 3 life preservers from me. which I just ignored. then I tried to lockpick the capt'n quarters. which failed as I was spotted.
And during the quest I had to pick up some FLL3 Turbopump Bearings... now this whole time the Battle Music was running. I spent a good 2 hours or so fighting it out with the raiders of Lexington and the surrounding area. etc
Now that's about all I remember... Keep up the great work guys. ^_^ your mod is a must have!!!