At least cold water shrinkage is temporary. I'd be thankful for a huge amount of cold water shrinkage.
If the squall raised some heavier seas it could be part of the issue. You might find that you leak more when the hull is flexing than sitting at the dock.
In the quest for interior comfort, structure is compromised. Some boats flex where they shouldn't flex, and in the big picture, the leak is a symptom of structural issues. It's the difference between bulkheads and partitions, such as that.
People see rot and fix it but the deeper issue is all that nice open cabin space filled with pretty bright work and unhindered by structural supports. If it's the price you pay for smiles, that's what it's really all about.
A racing hull is more like a submarine inside.