Hi we have identified an issue with the grid format within some themes - More, clean, Lambda. When an tutor hides all of the tiles and switched their role to student it is not possible to return to your normal role. The menu is grayed out and the drop down menu is not available. If you navigate to another course the menu works, but if still froze if you return to the original course. The only way to resolve this is to fully log out and back in again to the same course. Once this is done the original menu is available.
This does not happen when you leave tiles available to the students and it is not an issue when using the boost theme.
Thanks in advance