Apologies for posting on a thread this old, but I think I'm having the same issue as xandercolin and I haven't seen much conversation about it anywhere else.
I made sure every individual file in the hack pack replaced a file in the extracted romfs folder, I can get the game running, the new supports are all listed in-game, but none of the conversations are happening. I've tried several different supports that are supposed to have conversations in that changelog - namely MaMU/Gaius S, the new MaMU/Sully C, Chrom/Miriel C, and Chrom/Cordelia C. All of them skip the conversations and go straight to the "gained support level" message.
I've attempted to install this hack several times in the past few days, and no matter how many threads I scour for information I cannot for the life of me figure out where I'm going wrong. If I'm not mistaken, the Japanese files are what controls the conversations, right? There doesn't seem to be any Japanese files in the hack pack to replace those in the romfs folder. Do I need to find those files from a separate source? Do I need to code the conversations myself? I'm starting to lose my mind trying to figure this out, and any help whatsoever would be greatly appreciated.
Edit: I downloaded the hack pack onto my phone out of curiosity, and found that my computer had apparently corrupted the Japanese file names beyond recognition while I was blissfully unaware they were corrupted at all, as the files of the hack pack coincided perfectly with the romfs folder files. Copying the hack files directly from my phone managed to solve the issue, and everything is working as intended.