I noticed something,
When disconnecting keyboard backlight the battery start charging normally. OMG can't believe it.
So fast charging or the keyboard backlight hmmmm.
I actually had the laptop just repaired as graphic chip needed repairing. But noticed they had not connected back the backlight. So check with and without backlight.
Will need to take it back to get them to sort it properly.
hope this helps those who do not want to spend on their Mac but want normal charging.