Sonnet 5 and Context Keeping

I use Claude a lot for brainstorming stories that just pop in my head from time to time. I will use a project and will place documents in the project that he reads at the start of each new conversation so we can maintain a continuity.

Is anyone else doing something similar and feeling like Sonnet 5 is making up stuff more then Sonnet 4.6 did? rather then just using verified project files.