Hi there,
This is a bit of an odd one - but I'm 98% sure it's Start 11 related.
I'm using a Win 11 (21H2, 22000.778) desktop. 32GB RAM, Core i9... quite a powerful and usually rock-solid setup.
I have a Windows Hello-compatible camera. If I'm sitting at my desk, this signs me into Windows at the earliest possible moment during startup. When it signs me in, I can see the system tray populate with the various startup items that run here:

Just lately, after I sign in, and pretty soon in the startup process, the task bar flashes, the screen goes white for a second, the taskbar resets to what I expect it to be (my Start 11 settings) but all the startup items stop loading. All that stuff in the system tray (some of which is important, like OneDrive) doesn't get started and I have to kick it all to life manually.
I'm pretty sure that this is triggered in some way by Start 11 causing the re-draw of the taskbar ... maybe it's re-starting Windows Explorer for some reason...
If I DON'T sign in straight away (that is, if I allow all the startup items to start up in the background while the lock screen of the PC is still showing) then:
- they all start up just as you see them above
- I never see the re-draw of the taskbar (and flash of the screen to white).
I can't quite figure out WHERE in Windows Start 11 hides whatever setting it uses to make itself start automatically when Windows starts. It's certainly not in the Startup list in Task Manager. I'd like to find this, so that I can disable Start 11 without having to uninstall it (tried that - everything starts ok) and my old eyes can't spot a switch in the Start 11 app to disable it from starting up. And then maybe I just need to change the order of startups...
Any thoughts/hints appreciated.
Thanks.