Looking at your images thats not a leaking issue, its a splitting issue.
Whilst I have suffered flex splits in many of my leather shoes it always came down to matching the forefoot panels to my particular foot and flex ie some would always do it and others would never do it (footjoy in particular have single models that incorporate different builds in this area.).
Back to hyperflex - I've 2 pairs. One from 2015 worn on average 150 times a year up to 3 months ago, when I added another pair in a different colour which is currently being worn most of the time.
No3 splits, no leaks.
Edit - just realised that yours are the Hyperflex II model- mine were both the originals.
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