I'm trying to clone my Nexus 7 onto few more devices with NRT Backup + Restore option using Nandroid Backup / booting TWRP temporary.
The devices goes into bootloader mode and the screen freezes at this state. No "booting ... image" is visible, just "Start", "FASTBOOT MODE" etc. However, the device is actually booting up and the complete backup procedure completes fine in background with the bootloader screen still visible.
Restore however does not complete, because (as far as I remember) user interaction is necessary in TWRP which I cannot see.
When I restart the device it boots just fine.
Device: Nexus 7 v2 Wifi with Adroid 4.4.4 KTU84P, Bootloader FLO-04.02, unlocked
Any ideas why the display freezes while running temporary boot images?