FWIW, there's really no inherent problem with Leviton receptacles. The main issue with them comes about when a plug is inserted and removed frequently, since they are essentially designed for permanent plug-in, like you'd have with a washing machine or electric range/oven, etc. Frequent use wears the contact points more than with heavier-duty commercial receptacles, and can cause them to loosen and potentially overheat or arc.
The vast majority of the horror stories you hear about fires, melted plugs or breakers, etc., are because the owner either:
1. Uses the wrong (under-rated) hardware (receptacle, breaker, wire gauge, etc.), or
2. Does not know about or does not observe the over-Amp (80%) cautions, or
3. Uses more than one appliance on the circuit, causing overload, or
4. Has old, worn, under-rated, or faulty wiring or breakers to begin with.
Leviton receptacles are UL rated for their intended use. Under normal circumstances, your breaker alone should protect from overload, especially with GFCI or arc-fault protection, but that's not to be counted on. But if your EVSE is kept plugged in, you use the properly-rated receptacle and hardware, and you don't misuse it, your Leviton will serve its purpose just fine.