I noticed that if you zoom/pan the an ESRI web map while the device is in offline mode (airplane mode), the memory usage starts growing. If you're patient enough, the app will crash with 'out of memory' error message.
I've tried doing that while using the leaks instrument. This is the allocations graph after about 20 seconds of zooming around. I was able to reproduce it with a AGSMapView and a AGSWebMap.
Do you know where should I report this?