Possible headache coming
You can choose to ignore this because it involves a preview build, but I installed Windows 11 Insider Preview Quality Update (26300.8493) and explorer just kept restarting. I immediately thought it may be a conflict with Start 11 because this update was supposed include the option to move the Taskbar. I rolled back Windows, uninstalled Start 11 and reinstalled the update, but there was no change and Explorer just kept resarting. So I presume Start11 may not be the issue. But because I just did a regular uninstall of Start11 and didn't strip everything out of the registry, it still may be the source of the problem and I'm not ready to do a clean install of Windows to find out.
I'm on a Surface Pro 8 running Windows 11 Pro.
I have seen one similar report on Windows Feedback hub, but in their case the screen went black after login and I don't know it they were running Start 11 or any similar software.
In any case, this is just an FYI. I have rolled back Windows and plan to reinstall Start 11 for now.