Having the same or similar issue...Once I tap on the menu item, the correct sheet is displayed. Once I dismiss the sheet, the menu "button" on the toolbar is unresponsive to another tap. The output message is: while no context menu is visible. This won't do anything. Tapping the menu button a second time, opens the menu.
So, it appears that the menu button recognizes that the context menu is still open, even though it isn't. Not sure how to dismiss the context menu when the sheet that the menu option opened is dismissed.