hello guys

Since a couple of days ago, and after I downloaded KP50 ,I faced charging problem. Sometimes the charger starts charging after 20 seconds after I plug the charger in the device and sometimes it doesn't charge at all.
As I can see the usb port is still strong and not moving when I plug cable in it.
So I'm not sure but is this a typical usb problem that requires soldering to be solved??
or what the problem could be?
could it be the new KP that I downloaded?

And also when I try to connect the phone to the PC it start charging for 5 seconds and then it shows the notification "not charging" and the battery symbol in status area show that it's not charging the led also shows the same thing.
But the weird thing is that in status menu in the battery's bar there's written "charging"

Edit:
BTW the reason why I think it is a problem resulted from kernel power 50 is that when I try to charge my phone by connecting it to the PC- Motherboard's built-in USB ports it charges well.