Refer to figure.
It is possible that, in this case, the crew is experiencing the effects of a microburst. As you approach the microcurst, you will experience a headwind which results in a sudden increased airspeed. Consequently, lift increases and the aircraft "ballons". As decribed in the question text. As you fly through the microburst, the wind will change and the headwind decreases. As you fly immediately under it, strong downdrafts will be experienced which may be enough to force the aircraft into the ground or at least cause it to lose a significant amount of height. The next stage should be anticipated, as severe energy loss can be expected beyond the centre of the microburst. At this stage, the tailwind increases resulting in a sudden reduction of airspeeds which causes the lift to decrease. As a consequence, the aicraft will sink. If the windshear is too severe, a go-around should be immediately executed.

When windshear is encountered, crew must assess whether safe flight parameters can be maintained or not. If yes, the approach may be continued. If not, a go-around must be initiated without delay. Flight parameters must be carefully monitored.