My H4413 entered a happy reboot loop. Flashed it twice - same thing.
Known issues specific to Xperia XA2 Too many failures in installing Sailfish OS to Xperia XA2 devices have been reported tonight (Nov 8th). These devices fail to boot up after a seemingly successful flashing. Please consider postponing the flashing of Sailfish OS to XA2 until we know better the error mechanism and have been able to eliminate it. This would probably save you from unnecessary harm. Apologies for all this.