Faucet Leaks Only When Water Is Running Not When Off: Running Water Leak Causes Explained

https://farmhousekitchenandbath.com/blogs/news/enough-leaks_-how-to-know-when-to-hire-reliable-help-not-just-diy-fixes

Running Water Leak Causes: Why Your Faucet Leaks Under Pressure As of April 2024, roughly 34% of homeowners report leaks that only happen when water is actively running, making this a surprisingly common but confusing plumbing problem