The “always” is probably an exaggeration, but the original prompt failed for me every time, while the stricter version succeed in all of my 5 attempts. I’m using GPT4 via the official ChatGPT UI to be specific.

"Every snake likes quick brown jumps."

"Every great dream needs brave heart."

"Every night Brian reads about space."

"Every house holds sweet music tones."

"Every swine likes sweet green grass."