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I don't think there is any problem either.

But, if I was at all concerned about my duty ammo, I would buy some new stuff to carry and shoot the ammo that got wet as practice ammo. If you have to shoot for real, you don't want stray thoughts like "I wonder if it will go off?" running through your head.

I once soaked my practice ammo, Blazer aluminum hulled stuff, in light oil for a week (Kroil, a penetrating oil, to be specific). I chose the cheapy ammo thinking that it probably had the lightest amount of quality control. All of it went bang, none of it leaked oil and failed to fire, so I would expect good quality self-defense ammo to be oil - and water - tight as well.

GIs have carried government purchased mass-produced for the (hopefully) lowest cost to produce ammo for decades thru rains, rivers, mud etc, and while there probably were some misfires along the way, it doesn't seem to have really been a problem for the ammo.

But if you still have the slightest doubt, replace it and have one less thing to worry about, whether it seems reasonable or not.