Dear Samsung Member,
Greetings from Samsung Customer Support!
Samsung customer’s safety is on top priority that is why this concept is introduced with logic that whenever handset temp. or ambient air temperature goes up to certain set limit, then device automatically restrict fast charging or even some time stops charging. But post device temperature reaches to normal after cooling down the set, then automatically set starts charging normally.
Note:- Kindly turn off the handset for 5 minutes to cool down and recheck.
If the issue still persist kindly visit your nearby service center for the physical inspection of your device. You can search for the nearby service center from given link:-
Thank you for writing to Samsung.
Samsung Customer Support