For about a week now some of the KDE apps fail to start.
This is what I get when starting from command line:

ps@beest:~> kontact -v
kontact 5.23.2 (23.04.2)
ps@beest:~> kontact 
[9718:9764:0617/200306.668564:ERROR:gl_context_egl.cc(259)] eglCreateContext failed with error EGL_BAD_ALLOC
21 -- exe=/usr/bin/kontact
17 -- platform=wayland
16 -- appname=kontact
17 -- apppath=/usr/bin
10 -- signal=11
9 -- pid=9718
28 -- appversion=5.23.2 (23.04.2)
20 -- programname=Kontact
31 -- bugaddress=submit@bugs.kde.org
KCrash: Application 'kontact' crashing...
The Wayland connection experienced a fatal error: Bad file descriptor

ps@beest:~> inxi -Ga
Graphics:
  Device-1: Intel CoffeeLake-H GT2 [UHD Graphics 630] vendor: Lenovo
    driver: i915 v: kernel arch: Gen-9.5 process: Intel 14nm built: 2016-20
    ports: active: eDP-1 empty: none bus-ID: 00:02.0 chip-ID: 8086:3e9b
    class-ID: 0300
  Device-2: NVIDIA TU104GLM [Quadro RTX 5000 Mobile / Max-Q] vendor: Lenovo
    driver: nvidia v: 470.182.03 alternate: nouveau,nvidia_drm non-free: 530.xx+
    status: current (as of 2023-05) arch: Turing code: TUxxx
    process: TSMC 12nm FF built: 2018-22 pcie: gen: 1 speed: 2.5 GT/s
    lanes: 16 link-max: gen: 3 speed: 8 GT/s ports: active: none
    empty: DP-1,DP-2,HDMI-A-1 bus-ID: 01:00.0 chip-ID: 10de:1eb5
    class-ID: 0300
  Device-3: Chicony ThinkPad T490 Webcam driver: uvcvideo type: USB rev: 2.0
    speed: 480 Mb/s lanes: 1 mode: 2.0 bus-ID: 1-8:3 chip-ID: 04f2:b681
    class-ID: 0e02 serial: 6926
  Display: wayland server: X.org v: 1.21.1.8 with: Xwayland v: 23.1.2
    compositor: kwin_wayland driver: X: loaded: intel,nvidia
    unloaded: modesetting dri: i965 gpu: i915,nvidia display-ID: 0
  Monitor-1: eDP-1 res: 2560x1440 size: N/A modes: N/A
  API: OpenGL v: 4.6 Mesa 23.1.2 renderer: Mesa Intel UHD Graphics 630 (CFL
    GT2) direct-render: Yes

What info is required to get this fixed? Is there a possible workaround until then? 

best,
peter