Performance profiler should tell you what is going on.
Unfortunatly it does not !!! Gave it another good try, but all comes up clean !!!
I never knew how to test the live version could you give me an idea where to look for that if it is possible ???
Then it may not be Flex. Maybe comment out the Iframe code and see what
It was suggested by 'flexy' FlexDev.eu 'Maybe to many Timers - To many containers' so I started with resetting the code to one main Timer, and that made a great difference to the running - switching between Listeners with ONLY one Timer.