Just enough water to splash the under side of the car ...a pool 3' wide by 2" deep on the road...moving at 70 km/h...
Not very “deep” so we will stick with puddle ...
At 70 km/h/43 mph hard to imagine much more than a quick spray of moisture to the belly pan, battery pack and wheel wells. Wonder if something in the regen system (rear wheels) took on water?
Perhaps the ESP & antilock systems noted problems (tire spin out of sync) but in response malfunctioned?
A proper scan tool with an enhanced code reader might show a stored fault code???