Hello Pawel,
To ensure your preference for the sidebar position is saved, you can enable the use of cookies to personalise your Mixpanel experience. This setting will allow Mixpanel to remember your preferences, including the position of the sidebar.
Here's how you can enable this setting:
1. Go to your account's "Personal Settings".
2. Navigate to the "Data & Privacy" tab.
3. Enable the "Use cookies to personalise your Mixpanel experience" option.