Yeah, I’m having that same problem as well. I have a Pi 2, and a 32gb card. It’s an older one (A-data maybe?) but I’ve always used it for my Retropie system and it’s been great.
My card passed using h2testw as well.
I’m getting the same exact errors that you are running build 3.6. I went ahead and put 3.5 back on, and it works great. So I’m fairly sure it isn’t the card. I’d try putting 3.5 on and seeing if that helps you out. Good luck!