I solved it by performing these 2 steps: Step 1 (soft reset): - Press and hold the Power and Volume Down button simultaneously until the screen turns off. - The device will reboot automatically. You will soon see the Samsung logo. If not, just press and hold the power button . Step 2 (clear device cache ): - Turn off the Galaxy S7, and then press and hold the Volume Up, Bixby, and Power button simultaneously. - On the Android recovery screen , use the Volume Down button to navigate down to wipe cache partition and press the Power button to select it. - Use the Volume Down button to select Yes — delete all user data , and then press the Power button to confirm. - Wait for the reset to finish and press the Power button when prompted with the message to Reboot system now. After these two steps the battery drain issues were over.
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