Kwin_wayland high CPU&GPU usage after sleep

Greetings I have a following problem: everything is fine until I wake my laptop from sleep, after which kwin_wayland starts to consume 10% CPU and 70% GPU. I really need wayland as my second 4k monitor is HiDPI and I need to scale it differently from laptop’s screen.
Here’s output of inxi -G

  Device-1: Intel Alder Lake-P GT2 [Iris Xe Graphics] driver: i915 v: kernel
  Device-2: Microdia Integrated_Webcam_HD driver: uvcvideo type: USB
  Display: wayland server: v: with: Xwayland v: 24.1.0
    compositor: kwin_wayland driver: X: loaded: modesetting dri: iris gpu: i915
    resolution: 1: 2560x1440 2: 1920x1200
  API: EGL v: 1.5 drivers: iris,swrast
    platforms: wayland,x11,surfaceless,device
  API: OpenGL v: 4.6 compat-v: 4.5 vendor: intel mesa v: 24.0.9-manjaro1.1
    renderer: Mesa Intel Graphics (ADL GT2)
  API: Vulkan v: 1.3.279 drivers: intel surfaces: xcb,xlib,wayland

Other system info:

Operating System: Manjaro Linux 
KDE Plasma Version: 6.0.5
KDE Frameworks Version: 6.2.0
Qt Version: 6.7.1
Kernel Version: 6.9.3-3-MANJARO (64-bit)
Graphics Platform: Wayland
Processors: 16 × 12th Gen Intel® Core™ i5-12500H
Memory: 15.3 ГіБ of RAM
Graphics Processor: Mesa Intel® Graphics
Manufacturer: Dell Inc.
Product Name: XPS 15 9520