Close, Minimize, Maximize buttons not present in Calendar Preview with new Custom Window Frame selected

I know Calendar is in preview and I am loving the new option that hides the title bar and makes mailspring look so much better on KDE, but is there a way to hide the banner letting you know the Calendar is in preview? I feel like its blocking the window buttons. I know I can close the window from the dock or by pressing Alt+F4.

Window controls not present and can’t click to drag window: