Application switcher not cycling anymore on hold

10.9.5 here

Suddenly my Application Switcher won't cycle anymore on hold. It still can cycle between apps one by one, but if I hold command tab it will stop after reaching the right end of the row. Before that it used to keep cycling until I release command tab.

It's not so much that the loss of this minor feature is annoying, it is why it happened in the first place. As far as I know I didn't install any new app nor change anything. I found out that the same is true for any session not just mine. I also tried safe boot to no avail.

Thanks for any hint.