You may use a 3rd party app Ampere to measure and share a screenshot. The root cause can identified on that.
Dear Samsung Member,
Greetings from Samsung Customer Support!
Please perform the below mentioned steps to resolve the issue:
1. Kindly follow the standard charging procedure. i.e please charge the device in switch off condition for a minimum of 10 minutes.
For further assistance, register your concern in Samsung Members Application (Open Samsung Members Application > Get help > Send Feedback > Error report/Ask questions).
Thank you for writing to Samsung.
Samsung Customer Support