Just to say that I have the same problem. I have six units, the latest firmware, and all but the main one (which is in Router mode) drop in and out intermittently, usually in groups of two or three....

Half the time this works for me, and half the time it doesn't. A bit like the units themselves....sigh...

@Shev You'll see from this forum that a lot of us have this problem. I'v done Factory Resets on units, and still the problem returns, even if the unit is standing 2 metres away from the main P9 in...