Annoying Tap Tempo Pedal Issue...

I have the boss FS-fL plugged into the back of the Kemper set to tap tempo. But when I'm playing it seems to go to the red Beat detection screen randomly on the front of the Kemper and the only want to get it back to the regular LCD is hitting exit. Anyone else have this issue. Also, I know if you hold down the pedal and play it's supposed to trigger the Beat Detection but I've never been able to get it to work using the FS5 or the FS5L. Any ideas?

That's odd..I didn't work at all with the FS-5U...

Even with it plugged in, same thing happening. No one else???