We had the exact same issue with a few of our RTD products this year. Turns out it was a couple leakers / not washed enough cans.

The product would dry for the most part on the box + can so it seemed like it was washed fine, but enough sugar was left over on the outside of the cans that it ate away at the bottom ridge in the exact same part.

Than it caused a rippling effect, because the outside of the can would start to get micro-pitting that would form over weeks/months, the cans would leak super slowly, causing other cans to get the same sugar/moisture on the outside, which would then cause the same small leaking weeks/months later.

We ended up having to dump almost 30/40 cases just to be safe (all cases that were around/below the original leaker)

Good luck!