After the recovery mode jumper is shorted, the USB recovery process back to easy installer fails if the debug serial connection is open at the same time when the recovery-windows.bat script is run.
USB configuration changes during the recovery script twice, but if the serial connection is open, the configuration never changes to the VID=0x1b67 PID=0x4000 device, which then timeouts.
Tested in Windows 7 and Windows 10, Dell Laptop and Desktop PC. The serial connection has Moxa uPort 1250 serial to usb converter. Changing USB ports does not have any effect.
I am not sure whether this problem originates from the Apalis board recovry mode or the Windows or if the Moxa has something to do with it.