Charles Spurgeon Commentary 2 Kings 13:6

"Nevertheless they departed not from the sins of the house of Jeroboam, wherewith he made Israel to sin, but walked therein: and there remained the Asherah also in Samaria.)" — 2 Kings 13:6 (ASV)

Israel's repentance was only half-hearted; they repented because they suffered. They repented because of the suffering rather than because of the sin. They went back to the sin after they escaped from the sorrow.

Oh, do not be so, my hearer! If God has chastened you on account of sin, let yours be a thorough repentance. Go to God with hatred of your sin; for until you get rid of sin, your being rid of sorrow will be a small blessing.