Even if I pick expert on the Research, it switches me to Fast. And then even if I try expert again, it seems to show the cached result of the fast mode. So it's unclear if it's using expert. Also the Chat is defaulting to 3.5 turbo. I previously had Ultimate and this was not happening. I went from Ultimate to Starter to Ultimate and then it started happening.
Expect ultimate to default to expert or gpt4 models. Expect changing to expert model to not use the cached result of the fast model.