Bali crash
May I suggest we wait for the FDR results before pontificating on the reason for this undershoot.
It was suggested that there is no effect from a "normal" rain shower, however, "normal" depends on the IAS and can be affected by tailwind due to vortex and/or rain on wings that are close to stall speed as when a pilot is trying to make a short field landing i.e. "dragging it in".
Therefore, let's wait for the facts before going into 20/20 vision speculations !
As a long term soaring pilot I am very aware of water on the wings and the negative affect it has on L/D and this I respect in the highest degree when flying near rain and CB's.