I'm seeing it in every aspect of the game that has a lot of images to load (antiques, settlement, map, etc). I'm using Brave. I don't do GvG so I cannot attest to that, and I have been 100% unable to get a single GBG fight to happen, takes me 10-15 refreshes to try to setup my antiques, and even then if 1 thing doesn't load (the spinning load symbol for a graphic), the entire thing fails and I need to refresh again.
I was hoping the update today was going to take care of it, if anything, I think it's worse.