Switching from version to version is not recommended, since the newer version commonly added new save variables that can't be loaded in the old version -> usually breaking the game. This usually ends in all dialogues won't get loaded, so it just shows you the first ones right after loading the game.
Restarting the game is better.
Ah, now I know what you mean. Yes, there won't be any lines from the elite enemy when using Hypnosis Powder, cause he/she has no preference anymore, cause of said powder. I could have let them say random lines, but this didn't felt right.