Problem Details:

You press the F1 key. Once again, to return to the original When you press the F1 key.

Then, press the F3 key. Once again, press the F3 key, but the screen does not return to the original.

F5, F8, F9 key likewise.

Video or screenshot showing the problem:





osu! version: 20151220cuttingedge

This looks to be an oversight.