WB blurs the desktop while applying a new blind but is no longer restoring the desktop to clarity, at least while also having an an animated desktop. The workaround is to place a static image as the background (changing the dream does not unblur the background) and then applying a dream background.
My setup:
indows 10 Enterprise (18362.19h1_release.190318-1202)
WindowBlinds 10.84 (059 - Windows 10 Edition) - 64 bit OS
Window titlebar blur features are enabled on this operating system
Wblind.dll 2019/11/18 08:41:12
Wblind64.dll 2019/11/18 08:41:51
Wbsrv.dll 2019/05/03 23:29:46
WB10Config.exe 2019/11/18 08:41:16
Wbload.dll 2019/05/08 15:13:37
Screen10.exe 2017/03/28 08:53:17