https://pbs.twimg.com/media/BkIAPZMCEAAogfL.png:large
Would you normally wait 4 minutes before checking in on the new frequency?
Change from Delivery to Ground: 32 sec delay
Change from Ground to Tower: 11 sec delay
Change form Tower to Approach: 1:27 minutes delay (from take off clearance)
Change from Approach to Radar: 3:59 minutes delay
Yes, you could have important things to do (aviate, navigate) but 4 minutes ...?
I guess what I'm saying is; Was there some problem developing at that time already?