Airplane mode started to drain a lot of battery since Marshmallow

So, while on Lollipop, I used to let my Galaxy S6 on Airplane mode overnight. After 8 hours, it spent between 1 and 3% of the battery life. After Marshmallow update, it starded to consume like 20 or 30% of battery life. Is there something I can do to prevent that? Thanks

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