The control section of Start11 settings are all on "Start11 menu". All the switches on this page are on except "Open the start11 menu on the screen the mouse pointer is on".
Restarting Windows Explorer does not cause the problem. Only a reboot causes the problem.
Since this is happening on both of my machines, it would seem the problem is caused by something that I have set on my machines that you are not used to. The way I came to the Start11 application is by using this "hack" by howtogeek. It is the only thing that seems suspect. So this was done on both machines (for years) before Start11. But a particular Windows 11 security update destroys that functionality so I'm abandoning it for Start11.
I was going to start backing out the "hack" setup to see if it would fix my Start11 problem, but it seems you are using the C:\Users\Brice\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\User Pinned\StartMenu
and that was part of the "hack" setup. I don't know how you knew how to populate my menu with my applications but can only assume it is this directory.
Let me know if this makes any sense or if you have other ideas.
Thanks.