I'm getting some feedback with high gain, especially when using some kind of boost. I’ve swapped guitars, changed firmware, changed amp models, and its persistent. It may be related to internal volume as it’s worse with the output up and can be triggered by raising the cab volume after the amp block. Also, it only seems to happen when using the main outputs (level all the way up), not using headphones (level around 25%). Didn’t notice this on the axe 3 or any other devices.