Launcher shows "Ready to update & play Minecraft" or "Ready to download" even if no update is pending

When "Use latest Version" is used in the profile, the Launcher shows in the lower right corner

Ready to update & play Minecraft 13wXX

even is no update is pending.
Restarting the launcher does not change this.
When changing the version in the profile to 13wXX (insert latest snapshot here), the display is

Ready to play Minecraft 13wXX