FS sometimes locks up after starting RC .

I had this same problem in rc3.On some planes when I minimize view and then start RC I go back to a black screen and FS is locked up.When this happens I start all over and then switch to the Cessna or another plane before minimizing and starting RC.Then when everything is OK I switch back to the AC of choice.Has anyone else reported this problem?It's common when using add on planes or panels.Thanks,Ron