On our recent trip to CA over Memorial Day we had 30 supercharger stops.
Not one was completely ICED.
One station had three of 6 stations ICED on our way out to CA.
On our return trip, the same supercharger had a construction barrel that had been placed there by the hotel staff. It had a sign indicating EV charging only, violators would be towed. And, no ICE vehicles.
If you see an ICED charger and the sign says EV charging only, call TESLA.
If the sign says general parking, you are out of luck, but call anyways.
The staff can't fix it if they don't know about it. Likewise, Tesla can't fix it if they don't know about it.
Of the two situations I know of where this was an issue, once Tesla and the business owner were made aware of it, it got resolved.