Xperia X bootloop after Restore from UI

REPRODUCIBILITY (% or how often): a raw 30%
BUILD ID = 4.1
HARDWARE : Xperia X F5121
UI LANGUAGE: UK English

DESCRIPTION:

Some Xperia X correctly flashed with Sailfish OS, activated and tested working got a “Restore” command from Setting and then the Xperia
is stuck in a bootloop at the License Agreement.

STEPS TO REPRODUCE:

  1. Flashing Sailfish OS
  2. Setting, Restore command
  3. Power on the phone after the restore process

EXPECTED RESULT:

  1. Accepting agreement and activating the Xperia X

ACTUAL RESULT:

Phone is stuck at the page agreement, it get back to the previous step and repeat

ADDITIONAL INFORMATION:

I didn’t replicated this specific issue - was reported to me by a customer - but it happened to me a similar bug after a “Restore”.
There is probably some check to be done around the Restore command
(also that button is disappeared on Xperia 10 II)