Im actually having this problem now. Turn off one water valve at a time to see if it stop. Nope.. still dripping while both are off. Disconnect the hose that screws into inlet water valves on washer (have towel bc water will drip). I discovered build up on the hot water inlet valve and the cold hose still leaked, like constantly. So i placed the cold water hose in the washer and turned on the water valve (quickly) just a little to try flush the line. The drip stop. Then cleaned the valves the best I could. Connected it back and power on and tested the Drain/ Spin cycle. No more drips. Only cost me 45 mins of time.
Possibly reasons if it happens again
• Clogged water inlet valves or hoses lines from mineral build-up or
• Shut off valve going bad or something prevent a closure.