When you enter fly mode as admin nothing happens, if you tick the ghost button it will work as it should as ghost and “fly” and pass thrue everything, but pure tick the fly box as admin does not work in the new Enhanced version
You might have to add shortcut buttons again to operate your fly ability. I noticed in the Controls, the buttons for flight were unassigned. I haven’t assigned buttons myself (yet), but I noticed it.
If you opt-ed to ghost, you will “fly” so the function in itself ain’t broken, the “fly” part is in admin controls.