Re: Springboard crashes when i lock phone
Do you have any lock screen tweaks? This would be the obvious starting point in trying to figure out which might be causing it...and unfortunately, knowing how some of these customizations work, issues with performance won't necessarily show up immediately (for instance, at one time, there was a tweak for the clock back in iOS 5 or 6...can't remember really which...and the bug actually didn't happen until there was a dual digit numeral in the clocks prefix (IE: 10, 11 or 12)...it had something to do with the area that the clock numbers were in and causing some issue with where the notification for a text would come in. Anyways, it didn't show up until the time hit, and then it caused the springboard to crash.
Go through your tweaks, and if you can, remove them and see if the same issues happen...work through these tweaks until you find it. If you don't find the culprit, try a restore and then re-jailbreak the device.