My phone is somewhat older sony xperia v. still running on android v4.1 jelly bean. recently it behaves abnormaly. whenever I put it in charge (wall adapter or usb plugged into a laptop) , it only sometimes very slow to respond while chargin and almost always slow to respond after i remove the charging cable. its usually working very much fine but in only these situations it acts abnormly.
i don't have many apps installed and i usualy force-stop them after i use them. and also phone works very much fine in normal situations. only after charging this happens.
why is this happening and what can i do to avoid this? please help