Those issues have been around for a while. The land spikes and river elevation issues were introduced a couple of patches ago. They’ve fixed most of them in most places, but it seems Québec is still heavily affected.
I’ve seen tons of these issues around the entire Gaspésie area, particularly the south shore from Percé to New Richmond. The entire area around Bonaventure and CYBV is just completely messed up. It’s especially bad following the Grande Cascapedia river north from New Richmond. I lived there for several years, so it kinds of hurts my eyes to see such horrible representation of my former stomping grounds when it used to look so good.
I’ve also seen them around Mont-Joli as I was coming in to land at CYYY. I haven’t been to the other areas you’ve decribed though, but I have no doubt it looks pretty bad.