Device Restarts Whilst Restoring (iPhone 7)

Hi, Thanks in advance.

I am trying to restore an iPhone 7 that is disabled.

I have downloaded the latest iOS update in iTunes, however each time I put the iPhone in recovery mode and proceed to restore via iTunes the iPhone decides to restart about 2 quarters of the way through restoring. The device goes back to the disabled screen and iTunes continues as if nothing happen. Then iTunes comes up with a error message saying the device cannot be found (i.e. it was unplugged).

Any suggestions on what might be causing the device to restart during the restore process.

iTunes is up to date. Mifi Cable and I'm using a Mac.

Please note I cannot access anything on the iPhone as it is in disabled mode.