QScreen geometry / size wrong after setting new mode (e.g. with xrandr)

This is a multi-monitor setup.

DP3 is at 0x0+2560+1600
(2560x1600 in landscape mode)
HDMI2 is at 2560x0+1200+1920
(1920x1200 in portrait mode, right of DP3)

When I start my application, the Geometry & Size for HDMI2 are reported correctly. However, when I resize HDMI2 with xrandr (e.g. xrandr --output HDMI2 --mode 1600x1200 and xrandr --output HDMI2 --mode 1920x1200) the reported values are wrong.

QScreen * screen is acquired by iterating over QGuiApplication::screens() and comparing screen->name().

at 1920x1200 (portrait mode, so 1200x1920)

• geometry() ok
• virtualGeometry() ok
• availableGeometry() ok
• availableVirtualGeometry() ok
• availableSize() ok
• availableVirtualSize() ok

geometry():  QRect(2560,0 1200x1920)
virtualGeometry():  QRect(0,0 3760x1920)
availableGeometry():  QRect(2560,0 1200x1920)
availableVirtualGeometry():  QRect(0,0 3760x1920)
availableSize():  QSize(1200, 1920)
availableVirtualSize():  QSize(3760, 1920)
orientation():  Qt::ScreenOrientation(PortraitOrientation)
nativeOrientation():  Qt::ScreenOrientation(PrimaryOrientation)

at 1600x1200 (portrait mode, so 1200x1600):

• geometry() ok
• virtualGeometry() wrong
• availableGeometry() ok
• availableVirtualGeometry() wrong
• availableSize() ok
• availableVirtualSize() wrong

geometry():  QRect(2560,0 1200x1600)
virtualGeometry():  QRect(0,0 0x0)
availableGeometry():  QRect(2560,0 1200x1600)
availableVirtualGeometry():  QRect(0,0 0x0)
availableSize():  QSize(1200, 1600)
availableVirtualSize():  QSize(0, 0)
orientation():  Qt::ScreenOrientation(PortraitOrientation)
nativeOrientation():  Qt::ScreenOrientation(PrimaryOrientation)

back at 1920x1200 (portrait mode, so 1200x1920):

• geometry() wrong (inverted)
• virtualGeometry() wrong
• availableGeometry() wrong
• availableVirtualGeometry() wrong
• availableSize() wrong
• availableVirtualSize() wrong

geometry():  QRect(2560,0 1920x1200)
virtualGeometry():  QRect(0,0 0x0)
availableGeometry():  QRect(2560,0 1200x1200)
availableVirtualGeometry():  QRect(0,0 0x0)
availableSize():  QSize(1200, 1200)
availableVirtualSize():  QSize(0, 0)
orientation():  Qt::ScreenOrientation(PortraitOrientation)
nativeOrientation():  Qt::ScreenOrientation(PrimaryOrientation)