I personally find that models are trending towards ignoring any instructions given to them, so depend more on vendor-instilled behavior. Anecdotal, but I had bad experiences with OAI's new 5.6.
Same for me. Not sure if its intentional (do they want to push people towards workflows that will burn more tokens?) or if it's just a side effect, but it's very annoying. I refuse to use tools that dictate how I develop, I'm just going to switch models to less opinionated ones.
I let it have elevated permissions and it started doing some crazy things like figuring out I had zsh and running zshell commands instead of the common ones.