In my setup I use a 3440x1440 monitor as my main and a 2560x1440 one for a secondary.

I have Windows 11 set to show the taskbar on the secondary display.

With Start 11 installed I get an annoying bright green vertical bar at the far left of the secondary taskbar every time I boot up my PC.

The only way I can get rid of it is to go into the Windows taskbar settings and turn off the option to display a bar on every screen then turn it back on again.

I have confirmed this only occurs with Start 11 installed by uninstalling it and doing a reboot.

Here is a photo I took of the bar:

As you can see it's very bright compared to the taskbar colour from my theme!

It is such a shame this is occurring as Start 11 provides me a functional start menu when the Windows 11 one keeps failing to appear for no apparent reason! Just today after booting my PC and logging in, I checked emails and went to a web page in my browser to check something from one of the emails, not even 15 minutes of PC use and after that the Windows 11 start menu stopped functioning! Usually it takes a lot longer than that for it to fail. Start 11 works every time but I do not like the inconvenience of having to get rid of the green bar every time I log in to my PC.