New IMac and wireless keyboard/mouse problem

Hello guys, I just got a new imac with the wireless keyboard and mouse. The mouse always works perfect but the keyboard is not recognized 1 out of three times when I turn on the computer. There are no things close by that could interfere with the signal, and the batteries are 100% for both devices.

Any ideas why the keyboard is not detected sometimes?

thanks!

There was a recent bluetooth firmware update. Did you get that applied?