With the latest version (20160217.7) I immediately experienced a sound glitch when holding down F2 to select a random beatmap. The ticking sound it usually makes as it slides through the different beatmaps glitches out and continues to make the noise even after a beatmap has been selected, while still holding down F2.
osu! version: 20160217.7 (latest)
osu! version: 20160217.7 (latest)