Phone randomly stopped fast charging?

[Android Central Question]

I've had this phone for a month, and I've been using the same charger that I got with it for the entirety of the time I've had it. Suddenly the phone now says "Slow charging" and will now take 3h30 to charge from 50%? Is there anything I can do to fix this?

 

[belodion]

Note that members may be unable to answer properly unless you mention the phone.

 

[belodion]

As you can see, 2d later, they have been unable to answer.