We updated to build=134 / Library: 0.3.2-129 + 0.8.4-446r.
Starting with iOS 12.1, device-side processing time after IPSW writing became extremely long, and our software could display an error.
We had set the erasure completion-check timeout to 5 minutes, but in some cases processing completed just after 5 minutes, causing a timeout error.
In this fix, we increased the timeout to 10 minutes to allow more time for the device to complete processing.