I'm trying to replicate it, I'm not sure what went wrong... My guess is if you somehow managed to close the dialogue box it just wouldn't continue the cutscene anymore. Did you try just restarting and playing again? I'm sorry for the inconvinience, I'm sure the game is full of these, I didn't have much time to stress test T-T
Thank you for the kind words though, I'm glad you enjoyed the aesthetics! we had a very talented artist and composer ^^