Primary monitor: 2 panels (top and bottom)
Right-hand monitor: 1 panel (top)
Left-hand monitor: no panels
When I have a window maximized on either Primary or Right-hand monitors the rounded corners don't go away (and my desktop background peaks through the corners)
If I move the same window to my Left-hand monitor (no panels) when it maximizes it properly removes the rounded corners and properly maximizes
Additionally, if I increase the width of a window in either of the monitors with panels (Primary and Right-hand) so that it touches the edges of the screen, it does not remove the rounding. It does so properly on the Left-hand monitor (no panels)
Arch Linux, latest git build (kwin-effect-rounded-corners-git 0.6.0.r24.g721b244-1) and latest Arch version of kwin (kwin 5.27.10-2)
Noticed this on my 3 monitor setup:
Primary monitor: 2 panels (top and bottom) Right-hand monitor: 1 panel (top) Left-hand monitor: no panels
When I have a window maximized on either Primary or Right-hand monitors the rounded corners don't go away (and my desktop background peaks through the corners)
If I move the same window to my Left-hand monitor (no panels) when it maximizes it properly removes the rounded corners and properly maximizes
Additionally, if I increase the width of a window in either of the monitors with panels (Primary and Right-hand) so that it touches the edges of the screen, it does not remove the rounding. It does so properly on the Left-hand monitor (no panels)
Arch Linux, latest git build (kwin-effect-rounded-corners-git 0.6.0.r24.g721b244-1) and latest Arch version of kwin (kwin 5.27.10-2)