Joe,
Just as a talking point(s);
What type OC for this circuit ?
Time to trip, ( open the circuit )?
Was the same OC, if an CB, left in service after the recp was replaced?
Where practical ( if right angle plugs are not used ) I had changed my recps to "Ground Up " position several years ago.
I do not have many metal recp covers thru-out my premises'( house and two garages), but a few.
Glenn