I have reported similar issues and so far... No help because NI has not been able to repeat the issue. I've seen wild screen flashing, blanking, panel cycling, etc., with processes that have a combination of lots of data and/or lots of trends. The issue has been confirmed by me to exist in 6.6, 6.7 and 6.7.1. and was NOT present in 6.5.
I've discovered that the web player performs much better overall when screens have lots of hypertrends/HT-data. Both development and runtime versions have issues...
Ryan.... Any updates on this?