My s8 has stopped fast charging all of a sudden, it tells me the time which is usually 1h 40mins approx , but now takes well over 4 hours , ive tried different cable and uninstalling apps , ive put into safe mode and nothing helps
Have you tried toggling fast charging Off and On in the settings.
If so then a Samsung Experience Store or Samsung Service Centre location can run a diagnostic on the phone.
Current Phone >Samsung Z Fold³ 5G. Back Up Phone > Note 20 Ultra 5G SM-N9860.