Understandable, perhaps, you would prefer to test it on Windows Sandbox as mentioned here: https://support.stardock.com/space/SHC/1416855562/Testing+Start+in+Sandbox 

Or, you can do the Cleanboot steps: Refer here: https://support.stardock.com/space/SHC/1332445272/Fences+Clean+Boot. Do note Clean boot need to be done with care.

Try these steps and report back.

Thank you,

Basj,
Stardock Community Assistant

Have you tried those steps I mentioned above (reply#27)?

Thank you,

Basj,
Stardock Community Assistant

That is strange, so you mean the issue appear after two days with no issue? And after it appeared, it still appear after the next time you rebooted?

Thank you,

Basj,
Stardock Community Assistant

Yeah, it appeared again two days later on a cold boot. For some reason, it is not happening consistently.

I have since reverted to the default blue Start11 button for testing. So far, after dozens of boots throughout the day, it has been fine. Is the default start button applied differently compared to the other buttons?

Thanks, Basj. I am now using your custom button and will report any findings. Thank you for all this help.

Unfortunately that was short lived, they went back to empty boxes the next time I was using my PC, I'll have to have the enchanced taskbar turned of for now.  I don't know if anyone else has this issue, I've been waiting for an update to fix it, but it's not this one

Just for Information: The last Windows Update from yesterday messed everything in my Multimonitor setup with Start 11, I was not getting any icons on the Start11 taskbar, everything was getting slow and frozen, no matter how many times I restarted Explorer, the Start 11 service and the app. In the end I had to uninstall, reboot and install Start 11 to get back in order. Having lost 2 hours of work, from now on I will be always re-install Start 11 after a Windows Update to be on the safe side. 

I'm running Windows 11 Professional (25H2, OS build 26200.7840) on a system with two monitors. This machine never hosted Windows 10. My primary monitor is larger at 2560x1440, and positioned on the right. With a resolution of 1280x1024, the secondary monitor is smaller.
I'm currently running Start11 2.6.0.2, but this issue began with eariler versions. I've rebooted since installing this Start11 version.
I configure Start11 to position the taskbar on the right edge of the right hand monitor ("Align Right") to replicates the Windows 10 startbar position I used for many years. Autohide and resizing are currently turned off, although those settings don't appear to influence the problem behavior.
When I ask the Start11 configuration utility to restart Windows Explorer the taskbar initially appears on the bottom edge of the monitor, then after a few seconds it relocates to the right edge of the right hand monitor, i.e., normal behavior and the location I intended and want. The taskbar will remain visible there for hours or a day or two, then suddenly disappear. It feels like the taskbar is hidden, but I cannot get it to reappear.  Even when the startbar is invisible moving the cursor to the right edge of the monitor causes the window's thumbnails to appear, and I can successfully select a window. A right mouse click when the cursor is at the right edge of the screen and over a blank startbar area opens the menu whose top option is "Configure Start11". This is, of course, expected behavior.
I've tried turning on Start11's taskbar autohide, but that doesn't change the misbehavior, and with autohide turned on once the taskbar disappears it is still never visible.
I've tried reconfiguring the taskbar position to the bottom of the screen, and when positioned there it hasn't disappeared.
Once the taskbar disappears nothing I do restores visibility of the taskbar positioned on the right edge of the display other than rebooting Windows, e.g., locking and unlocking the screen. If I change the startbar location back to the bottom I will see normal taskbar behavior.
I'm a retired software developer. I'll gladly provide whatever help I can.

If by "manual restart" you refer to the Start11 Configuration program's "Restart explorer" button, clicking that button does not restore visibility of the taskbar.

If you refer to restarting Windows Explorer using Task Manager, I'll need to wait for the next failure to test restarting it.

Hey all,

I'm seeing a similar icon issue mentioned in the posts by Sayjimwoo.

I am running a Microsoft Surface Pro 9 i7-1265U/16GB RAM/512GB SSD with dual displays. The external display is 1920x1080 at 100% scale. The internal screen is 2880x1920 at 200% scale. I'm running Win 11 Pro 25H2 Build 26200.7840. I usually set the external display as the main display as I am slowly getting more myopic. 

If I plug in the external screen, the start icon sometimes displays correctly and sometimes slides off to the right and is covered by the next icon on the taskbar on the external screen. In those cases, the icon on the internal screen displays correctly.

If I boot with the external screen plugged in, the start icon displays correctly on the external screen, but is tiny on the internal screen and pushed to the left on the taskbar.

If I unplug the external screen in any case, the start icon on the internal screen becomes tiny and hard to use.

I have tried it with multiple icons, both custom ones and the ones that come with Start 11. They all behave the same way.

I have followed the steps suggested by basj to no avail.

This behavior began with the upgrade to 2.60. The icon worked beautifully on multiple screens in the previous version of Start 11 on the same machine. It has persisted across various uninstalls and re-installs of Start 11 and every system update since installing 2.60.

Currently I have mitigated by not using the custom icon and I'm mostly okay with that, because for me the start menu itself is more important than the start icon (the start menu works very nicely), but I wanted to add my experience to show that this seems to be a more universal issue than Sayjimwoo alone.

Blessings!

Anyone using last version of Start11 in a pc with an AMD VGA has problems with Adrenalin Panel not opening?

I'm trying to figure out a software incompatibility and don't know which software is the culprit.

Thanks.

Baio

Start11 has not misbehaved since I reported the problem!