We are having a issue that I believe is a recent issue. We've built 1000's of units and we've only experienced it recently(no service reports either). Also on this same unit we started using IQAN 6.08 but our production units are on 5.08 (have XC10's).
Anyway on this unit we have 3 different display pages, each one for a different layout of cameras(see images). If we switch the screen a couple times we can get it to start flashing as if its trying to display the other page then back(see vid - . IMG_0584.mov). If we switch to other screens and back its fine again.
We are going to do a measure group of the 'active display page' to see if its something we did. We don't have a production unit(IQAN 5) with a 4 camera system as I want to check out one of those too.
Customer support service by UserEcho