NO OTA after CSC change (OWO to OXM)

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Hi Guys,After changing my firmware from OWO (ZTO) to OXM (EUX), I´m no longer receiving OTA updates.On my previous devices S25, 24.. it would work.So now I have to use ODIN to flash every new firmware, and everytime is getting more dificult to get to download mode. ( via maitanence mode)Is there a work around so I could keep EUX and get OTA back?Thank you!