Ever since the hotfix that removed the check to the login server (in 12 feb), the client change to be stacked into one in the taskbar. I imagine it wasn't an intented change (because of the time it was introduced). But regardless of weather or not it was a change on purpose, I purpose a change to the client that would allow you to choose between stacked clients and unstacked clients (since it seems like a personal thing). Hopefully it's possible to add options to the game menu for that but I guess different client version / file in directory / etc could work too. People suggest taskbar tweaker which work fine, but it doesn't work on win11 so its an issue