There is a software fault.
Update the Wi-Fi module in the Miele app: Profile > Appliance settings > Appliance updates > Wi-Fi module update

During operation, the display on the oven switches off or the display shows the fault !! 0: Unknown SLT text !!.
Update the Wi-Fi module in the Miele app: Profile > Appliance settings > Appliance updates > Wi-Fi module update