Q990D forced update itself even when auto update is off

I just found out that my Q990D auto update itself to latest 1021.2 version even though the auto update is turned off in smarthings app. At first I thought that an update to app would have wiped off the settings but verified in the app that auto update is still turned off. Thankfully the device is working properly, but I am very skeptical of this forced update, when earlier samsung had such a blunder with previous update. Anyone else seeing this too?