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)

Confirming - this doesn't happen on fallback.

While on the subject, if you hold down F2 when entering the song selection the ticking sound will also play, even though it's not doing anything. Likely the same issue.

Edit: Holding F9 in the main menu also causes this.