Just an update after doing the latest Win11 updates today. I jumped into WoW and had the bnet app still visible on my second monitor. It looked to be working fine until the second WoW exited. Instantly the blank area between “Housing Virtual Tour” and the dropdown box to select a WoW version started displaying the flickering outline box. Closing the app and re-opening it fixes it, though initially a few days ago it was doing it on app open as well. No crazy 3rd party browser AV extensions or anything just default built in Win11 AV/malware protection. I also cleared the bnet cache in program files at one point according to Blizzard’s help pages for the app.