Bug: VoiceOver Crash on Handwriting and Braille After Restart due to Battery Drainage
I sent the following report to Apple. If you experience the same, do send your report as well.
On iOS 8, iPhone 6, activating Handwriting and Braille mode crashes VoiceOver whenever passcode is required when the phone restarts after full Battery drainage.
Consequently, the Handwriting mode, or even the Braille mode is unusable on the passcode screen after complete battery drainage.