s9 plus 15% below battery drain

[MrRobot]

S9 plus got 100- 15 % with 5hr 15 min sot and 24 hrs stand by which is excellent
But from 15 to 0 it went in seconds literally
Which very bad 
Does any one else face this issue
Please help me solve it

Thanks

[MrRobot]

change the battery its hardware issue