I'm pretty sure the Tesla Quebec club has reported it, at least through some members as they have a form for that too. It was my impression that the site had been "cut in half", only providing ~75kW per cabinet instead of 150kW, possibly because the transformer was bad. That would explain the 77kW I got on cabinet 1. However other cabinets outputting 40kW might be more recent. If it's the transformer then it's possible Tesla made this derating so that the site would at least work instead of going down, until the transformer is replaced. Getting transformers installed at new SC sites is taking many months already, and I believe the same is true for other charging equipment operators. Hydro-Quebec is either favoring their sites or at the very least are overloaded with demand.
EDIT: Ah, someone else posted about this. Look at the top post of this page stating Tesla is aware of a bad transformer.