Why is my LG G2 Lollipop keyboard so slow when charging?

[AC Question]

No matter which I use (LG Keyboard, Google Keyboard, SwiftKey, Fleksy, Go Keyboard), the keyboard is extremely slow and lags when my phone is charging. The second I unplug my phone, the keyboard goes back to its normal.

This started happening about a week or two ago.

About a month ago, I updated my device to Android Lollipop. After the update, nothing on my phone was functioning so I did a factory reset. Everything was fine after that until now with my keyboard problem.

 

[Rukbat]

That sounds like a filter component in the charging circuitry went bad. The bad news is that in most phones, those components are on the motherboard, and a motherboard replacement isn't cheap.