I've profiled my app and I see some errors that I want to report here if they can be helpful:
[UIPickerView setFrame:]: invalid height value 108.0 pinned to 162.0
> Note: My app have only invisible lists set in minimum size allowed by MMF2
AL Error: 40963
> It happens when I activate/deactivate groups after the app have been put in background and then put in foreground (live)
I also had a crash when I let the app run alone but I it brings me to an assembly code which doesn't seem that useful...