• Windows Build: Version 24H2 (OS Build 26100.2033)
• Start11 version: 2.11
• Enhanced Taskbar is on.
• It affects all games with borderless window and fullscreen applications, like a full screened video in VLC, or video playing in Chrome.

It is not something that happens consistently. I suspect it is something that starts occurring once I have alt tabbed out of an application a couple of times.

It is happening almost every time I full screen a video in a web browser.

I can confirm that this is an issue with the enhanced taskbar. Having disabled that, the issues go away completely. Which is a shame because I kind of hate it without the enhanced mode.

As I said, it isn't consistent. It behaves normally at first but then begins showing window previews and sticking over fullscreen apps. I will post a screenshot and conditions next time I get it.

Specs:

• Monitor resolution: 1440p
• GPU: RTX 4070
• CPU: AMD Ryzen 5700X3D
• RAM: 32GB 3200mhz

I performed a reinstallation per instruction and I still have the issue. I took a screenshot to show the taskbar showing window previews and sticking above the game but I don't know how useful that is. To reiterate, it's something that happens over time and I don't know what triggers it. I can restart explorer either from taskmanager or the button in Start11's options and it'll solve it but the issue will come back.

I know this wasn't what was asked for, but I did a full clean install of Windows 11 Pro. Same issue still present.

Hello,
I have forwarded your problem/question to Stardock Support Team for their assistance. Please keep an eye on this thread for any updates. We appreciate your feedback and patience.

Basj,
Stardock Community Assistant

Yes it happens after restarting explorer. After some more testing it doesn't seem to be intermittent and happens every time for me if I allow the window preview to appear before clicking the window for the borderless fullscreen program on the taskbar.
Restarting explorer makes no difference, it still happens consistently.
To be absolutely certain I tested on both my every day user account and on a new admin account using Microsoft's clean boot instructions and with a fresh install of Start11 and its happening on both accounts.

1. It still occurs with Start11 Start Menu style disabled. I turned it off and rebooted and tested again just to make sure.

2. Clicking within the borderless window does not have an effect, the taskbar remains.

Not sure if it's helpful but from what I can tell it happens with exclusive fullscreen windows as well, it just gets covered up.
E.g.
1. Hover mouse over an exclusive fullscreen window on the taskbar so the preview appears to trigger the bug
2. Click on it to switch to the fullscreen window. Taskbar vanishes as expected
3. Change the program from exclusive fullscreen to borderless in its options
4. Taskbar shows up over the now borderless window

If I instead
1. Switch to exclusive fullscreen window in a way that doesn't trigger the bug, by alt-tabbing or clicking before the preview shows up
2. Change the program from exclusive fullscreen to borderless in its options
3. Taskbar does not show up over the now borderless window

I have bought a key in the sale even though I am still having issues with it. The enhanced taskbar is causing the issue for me.