Currently I have one VVX Color Expansion Module connected to a VVX400. Sometimes, more often than not, when I push one of the soft keys it takes two or three pushes to get it to work. I've switched out to a new one and still no change. It is running version 18.104.22.16835. I've rebooted it several times and still no fix. Does anyone have this issue with theirs or have any solutions?