Wipe & Flashing has no effect

Hi,
I have a problem with my Moto G 2014 XT1068 which is described in topic: forums.androidcentral.com/moto-g-2013/391289-something-seriously-wrong-my-moto-g.html#post3668518
I can't do these steps, because dialog window shows up all the time, and i cant go further.
I have disabled usb debugging option and can't disable ART runtime.

First of all "Factory" in bootloader doesn't work. Wipe and factory reset via stock recovery has no effect; old android remains, the same using TWRP:
"E:Unable to open 'cache/recovery/.version' but ends successfully
and PHilz.

I've tried to flash many roms using many recoveries( TWRP - few versions up to 2.8.5 because 2.8.6 has display flickering bug, few Philz, and few others that also flicker) and fastboot and msfastboot(both on linux).
When i flash via fastboot or mfastboot using xml.zip roms everything looks ok, there are no errors, but flashing has no effect - I have still old ROM with old issue.
When i flash via different recoveries always some errors appears. For example flashing latest CM 12.1 nightly
via TWRP i get:
"E:Error executing updater binary in zip '/sideload/package.zip'
or via stock recovery (ADB sideload) get:
"(...)
Verifying update package...
E:Failed to verify whole-file signature
E:signature verification failed
Installation aborted."

Partition erase in fastboot despite "OKAY" message in CLI has no effect. As i understand this should remove all files from partitions.

This problem showed up when i discharged battery to 0% and turned on the phone.
Have you any ideas what should i try more?

Thanks in advance.