Windshear?
AVherald reports;
"...was on final approach to Dubai's runway 12L at 12:41L (08:41Z) but attempted to go around from low height. The aircraft however did not climb, but after retracting the gear touched down on the runway and burst into flames...."
Windshear was also reported.
Possibly the crew decided to go around due to windshear, but got caught in it and hit the runway?