Winter? These operate at just shy of 300 degree F. We laugh at winter. H2S embrittlment makes us cry, however.
I would look if you have a shallow leak (less than 3-5 feet shallow) and see if you are getting ice in the casing (or whatever you call water well pipe).
An ice blockage will detroy a pump, then when the pressure is off, drop and disappear.
It's a 125 ft well. 6" casing. These things fail from time to time. It's just a pain in the @ss to change them in the middle of winter when it's -25F. When you pull up the inner pipe or hose (pvc) everything freezes up before you can stick a new pump on and lower it all back down. Plus the well cap is usually under a 10 foot snow drift to start with... Ahh! the joys of country living, and red jacket™ pumps.