I recently sent some emails where I accidentally had a mismatch between link text and the destination itself.

One was where an email link didn't match its target:

alice@example.com (points to: bob@example.com)

I also had another email where the URL was slightly different from what was displayed:

example.com/profile/alice (points to: https://example.com/profile/bob)

I would blame myself for these mistakes, but the hover tooltip shows link text instead of the actual destination, giving a false sense of safety. The fix could be as simple as showing the destination in the tooltip, or adding a confirmation before sending when there's a mismatch.