sucking up water spray through a cai on a turbo car and causing engine failure is rubbish, the boost pipes should be warm enough to make it evaporate if it made it past your very hot turbo.
how do you think water injection works.
the only way i can see i causing engine failure is if you submerge the cai fully under and it sucks up litres & litres, it would cause the turbo to fail first then its got get all the way to the inlet, and i dont see how that is possible if there's no boost/suction.
tbh i think the water spray has maybe made it past your filter and contaminated your maf