Prompt Library variables used for input seem to break context in multi-turn chats

I read this two weeks ago, and the use of variables as a one-shot insertion into an early fixed message, or even developer message? No wonder the AI can’t figure out what’s going on. A conversation is: user: hello assistant: hello back at you not the next turn being: developer: you are a friendly AI\nWhat was my first message? assistant: hello back at you