SideBar widget - Show all place holders does not work

Latest platform as it is a boot camp. This works in my personal environment but not in the boot camp environment. The Sidebar developing needs to be done in the widget tree because the place holders are not displayed when this is selected from the widget or the display mode.

I have the same issue. It was working correctly on the previous version, but now unable to get it visible. The workaround I have used is by building the form in the main content placeholder and once ready drag it to the sidebar content placeholder in the widget tree.

Anyway, think this is a bug.

Same here. SideBar is not showing any place holder. its difficult to work without UI. Need to check on beta version.

Yes I have the same issue. Can only work in WIdget Tree for the sidebar. Don't see its content on canvas.