After Jailbreak

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After Jailbreaking my iPhone 5 (FW 6.1) most things went OK with small ups and dawns. The thing that still sticking is that when I delete any application from the main screen the phone blinks and restart , when it is done restarting and I slide the open bar it shows that it is in safe mood and I have to do a restart to go back to normal. I am wendring why ??? It will also be annoying if I have to go through this process every time I delete an APP.
Any help to solve this problem please

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