I'm happy to help you switch between your companies, @lpkoenig.
Sometimes, QBO unexpected behaviors like switch company not showing due to high memory usage caused by cache and browser cookies. In the meantime, I recommend using a private browsing window that doesn't store files. Browsers use cache and cookies to load web pages faster.
To open an incognito window, you can refer to these keyboard shortcuts:
If you still have the same result, I suggest utilizing another supported browser. It can help us identify if the issue is specific to your current browser. After the troubleshooting and the issue persists, I suggest to reach out to our support for further investigation as they can pull up your account and check in secured environment.