Hearing a lot of noise from the aio pump when cranking it could have made it spin up one more time, but it may have been loud because there's a lot of air in it, which would cause early failure.
Also, a comment more for others on this thread than OP, you can get more power from most fan headers (several are 12v, 2A) than USB (USB 2 headers that most aios plug into are 5V, 0.5A max), so I really don't get why people are saying no good ones use fan headers lol. The USB is often more for the use of individual software controls (for screens, rgb, etc. lol), not for sending power to the pump.