Stalls out when driving, intermittent, occurred maybe 7 times?

Side street speed, e.G. 10-35 MPH.

May stall and car rolls to a stop, or engine may restart while rolling, on its own (tachometer at zero for short time then recovers).

No check engine light.

Almost always restarts by putting in P or N and turning the key. A couple of times it cranked but did not start immediately but did on the second try.

No loss of power, no rough idle, no misfire, nothing wrong while car is running. Idle is 700-750 once warmed up.

Main relay (2 in the box) replaced but did not fix the problem.

No smell of gas.