In Blackrock Foundry (on The Black Forge part of the map, in the Dread Grotto) I got stuck on the other side of the railing. Specifically, near the water just north of where The Great Anvil leads into the Dread Grotto.
I tried to jump into the water over the lower part of the railing, like I normally would in the Overworld, and cleared the railing with ease once I had enough speed from the mushroom spores around the area. But realized too late that there’s an invisible wall around the water; and I couldn’t jump back out. I have a screenshot if desired; I’m unsure how to attach it here.
This is a little bug, and from old content, so I doubt it would be patched; but still, wanted someone at Blizzard to know.
As an aside, I wish it was more clear in the support menu that the in-game bug report system has been removed.