This issue happens on all windowblinds styles. Not just the one I shown to demo it. Every style included in WB I choose on both my systems and in the VMs have the same issue. It can be triggered on any style just by changing the color to light under windows settings. If on Dark, most issues will go away but not the one where the taskband button text color obeys the style's settings.
Upon looking further into the issue. When you use dark color mode, it will load the quicklaunch section in windowblinds style. But if you set it to light color mode, it shrinks the icons/makes the text transparent/loads the button from - Edit Toolbar Controls/button
Sorry to hear you are having issues. Would like to know more.
1) Theme you are using with a link so that I can have a look at it.
2) Just to verify, Windows version, please use Winver.exe for full version numbers and Windowblinds version.
Stardock Community Assistant.