You are not alone. I also hate it as it´s there since almost day 1. I sent a ticket one month ago, so you have my vote for this.
The problem happens when the amount of horizon is smaller than the amount of rendered cockipt (as in my second pic). It literally puts a white enviromental light all over the place, which seems to be light exposure similar to the effect used by Reshade, but multiplied by 1000 billions. So you basically can´t see anything outside except a white horizon. The smaller the horizon portion the worse. But when horizon portion is balanced or bigger than the portion of rendered cockpit all works well (as in my first pic). In outside view all works well too.
Please vote this, as that one and the fake horizon line on the mountains are the most annoying graphical artifacts we have. They ruin the whole thing.
Cheers