Sounds like it might be switching to Claude Haiku instead of Claude Sonnet. Sonnet 3.5 always has this issue for me though. It excessively follows the original

Sounds like it might be switching to Claude Haiku instead of Claude Sonnet. Sonnet 3.5 always has this issue for me though. It excessively follows the original instructions, even in vague ways. It's likely 3.5 (new) is even worse. We use 3.0 in production because of this one quirk.