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ECO start/stop shifts car into neutral upon restart

I had the battery replaced at my last service in my 2015 GLA250. I have had several issues at stop lights where the ECO system turns off the car and the car restarts but the dashboard goes black and then red text appears saying to not shift the car into neutral while driving. I have to put the car into park, turn off the car with the key, and restart it. Is this likely an auxillary battery issue? Something worse? Bad battery install?