I made a thread previously about a similar problem and the issue was fixed, but it seems other elements have broke in recent versions and I didn't want to necro a month old thread.
In the new QT UI, entering Fullscreen will always render in a new window, even when Render to Main Window is enabled. If I exit fullscreen, the game obeys the Render to Main Window setting again, but an extra invisible window for Dolphin remains in my taskbar. It seems unstable as well, as while testing Dolphin crashed several times with a Runtime Error and completely disabled my Aero Transparency at one point, requiring a restart.
Graphics settings: https://i.imgur.com/vO8Tze2.png
Example of invisible window: https://i.imgur.com/5pxXm4C.png
In the new QT UI, entering Fullscreen will always render in a new window, even when Render to Main Window is enabled. If I exit fullscreen, the game obeys the Render to Main Window setting again, but an extra invisible window for Dolphin remains in my taskbar. It seems unstable as well, as while testing Dolphin crashed several times with a Runtime Error and completely disabled my Aero Transparency at one point, requiring a restart.
Graphics settings: https://i.imgur.com/vO8Tze2.png
Example of invisible window: https://i.imgur.com/5pxXm4C.png