I still see the bug also. They might have fixed the action when 2 people try to siege or something at the same time, but they didn't fix the reset calc error, or the try to drop sectors when you've already dropped 4 error.
I get the error every day at reset while the calculation is running. I don't think it's a browser issue but it started over the summer the same time as the other map freeze reports. All you have to do to reproduce the error is click on any action in gvg maps while the calc is running, and you get the error message twice that calc is running and you should wait, and then you can't do anything else and must reload the game. Once you reload the game, everything is fine, you can go click gvg sectors and get the single message that calc is still running and it won't freeze, but the first time you always get double error messages and have to reload.
I also still get the "gvg map freeze" bug if I fail to count by grant freedom allowance correctly and try to drop a 5th one, that error message shows up twice also, and then you have to reload if you want to do anything further because everything locks up.