2001 Oldsmobile Alero Engine randomly stops

Engine randomly stops as if turned key off. No dash lights elluminated, ie. Check engine, security, oil, no buzzers, etc. After a short wait, less than ten minutes, engine restarts right away.
Fuel guage indicated 1/4 to 1/2 fuel remaining.

Engine runs and sounds fine. No fuel smell, hot oil, antifreeze etc. Only warning light is tire pressure. There is a reel slow leak front left tire, add 10 psi every week or so.

Fuel pump replaced 2 - 3 weeks ago. Swapped fuel pump relay.