Greetings,
I've noticed that the taskbar deskband disappears when I move the taskbar to my secondary monitor.
Windows 10 has a default setting that has the taskbar showing on all monitors/displays, but I disabled that and I regularly move the taskbar between my two monitors. It appears when the taskbar is on my default monitor, but it disappears when the taskbar is on my secondary monitor.
By the way, is there any way to enable the classic display mode on the deskband?